Honestly she's even concerned about wealth wrong.
She's very excited by the idea of it, and it alters her opinion favourably of those with it, but she never actually expresses concern for the lack of it (as we can see by her excitement over Lydia's marriage and complete lack of awareness over what their income could be). She's doing the exact opposite of what she should, which is being worried about her daughters falling for penniless men and not being noticeably obsessed even in public with the fortunes of rich ones and attempting to strong-arm a child into marrying a man she dislikes for wealth.
I think how thrilled Mrs Bennet is with Lydia's marriage basically tells us everything: he's not rich, she knows of his debts, hears about his "seductions" in Meryton, his and Lydia's selfishness almost ruined all the Bennets' reputations, and no mature and careful man who respected/loved a woman would elope with her because of the danger to her reputation and lack of fiscal protection having no marriage articles means for a woman. There are zero actual benefits to the marriage other than saving face socially, and yet Mrs Bennet's excitement and pride in the match and her son-in-law are excessive and genuine.
Wealth is a great added factor that influences her opinion greatly, and is why her own marriage is such an achievement, but she seems to care about marriages in and of themselves above not only the happiness of her daughters and characters of their husbands, but also above wealth.
She's getting an F in parenting class.
And, arguably, the reason Mrs Bennet hasn't learnt anything from the failures in her own marriage is because she doesn't see them.
Her marriage is an INSANE achievement. She jumped up a social class, top 0.2% of society in terms of income (and LANDED income, at that), and honestly I think she sees her relationship as pretty great. We see he isn't affectionate, and feels that "Respect, esteem, and confidence had vanished for ever" between them, and is happy in both "exposing his wife to the contempt of her own children" (and the public) by making a fool of her and letting her do it herself. But does she notice??
In a bad mood, she complains her nerves are being mistreated, but she levels those accusations at everyone no matter how unfair and hyperbolic the claim is, and in a good mood forgets it all, sees his behaviour as a joke, and doesn't seem to notice mistreatment or her husband's real opinion of her.
In my favourite example of that she even shows that she believes she has the power to influence his behaviour and decisions:
How good it was in you, my dear Mr. Bennet! But I knew I should persuade you at last. I was sure you loved your girls too well to neglect such an acquaintance. Well, how pleased I am! and it is such a good joke, too, that you should have gone this morning and never said a word about it till now.
It might even be true! Mr Bennet doesn't seem fond of society, but Mrs Bennet is regularly seen entertaining large parties at home and they attend all the premier social events as a family, and when Jane was going to Netherfield Mr Bennet went from a non-committal "[the horses] are wanted in the farm much oftener than I can get them" to "an acknowledgment that the horses were engaged."
Even when it definitely isn't, like when he goes from saying "Into one house in this neighbourhood [Lydia and Wickham] shall never have admittance. I will not encourage the impudence of either, by receiving them at Longbourn" to then receiving them - Mrs Bennet might not know it was "Jane and Elizabeth, who agreed in wishing, for the sake of their sister's feelings and consequence, that she should be noticed on her marriage by her parents, urged him so earnestly yet so rationally and so mildly, to receive her and her husband at Longbourn, as soon as they were married, that he was prevailed on to think as they thought" instead of her own influence. In this light, Mrs Bennet is very justified in thinking she can persuade (or wear down) her husband.
And, though Mr Bennet absolutely failed his wife and daughters emotionally, financially, socially, and with their educations he also "was not of a disposition to seek comfort for the disappointment which his own imprudence had brought on, in any of those pleasures which too often console the unfortunate for their folly or their vice." So he wasn't a drinker, wasn't having affairs (and thus bringing that risk of STDs back), and wasn't spending money gambling or on said affairs or town, which left Mrs Bennet without the usual glaring red flags of having a bad husband. And she must've had significant control of the purse strings, if Mr Bennet's "love of independence had alone prevented their exceeding their income."
Nor do we have any indication that he was violent or angry - when his patience is wearing thin he leaves the room. He also isn't solely getting annoyed or wearied by her behaviour, we're told "her ignorance and folly had contributed to his amusement" and so she might often see him smiling at her, not knowing it's because he's laughing at her. There is no fear of Mr Bennet, nor excessive respect of his authority as head of the household, in his wife or any of his daughters. Mrs Bennet argues with him, scolds him, sulks at him, pressures him, etc without ever worrying how he will react. Her behaviour towards him doesn't seem to be curtailed at all, she's got a lot of leeway in that respect.
It all paints a picture that (for the time) Mrs Bennet actually had considerable freedom in their marriage and over her own life - to my recollection the only things we see getting definitively vetoed and not just complained about but eventually complied with (aside from the aforementioned exceeding their income and not pressuring Elizabeth to marry Mr Collins - two very reasonable pushbacks) is giving money for Lydia's wedding clothes, and the Brighton scheme. The latter of which, given the travelling and destination expenses, may have been rendered impossible due to their spending habits without saving a bit first even if Mr Bennet wasn't disinclined. Perhaps also historically trips to London have been vetoed, but as Elizabeth says "My mother would have had no objection, but my father hates London" which doesn't seem like Mrs Bennet has been expressing a strong opinion either way, it was likely never big conflict she noticed.
We also know that "Five daughters successively entered the world, but yet the son was to come; and Mrs. Bennet, for many years after Lydia's birth, had been certain that he would." The phrasing of which doesn't include Mr Bennet in this hope, which implies he was still sleeping with his wife when he didn't think anymore children could be conceived. Even though her "weak understanding and illiberal mind had very early in their marriage put an end to all real affection for her" so there's no way affection was playing a part in his choice at least a decade into their marriage. Given her beauty played a huge part of why he married her, it's a reasonable assumption that the lust is still there even though the love isn't. They could very well still be sleeping together, occasionally or often, at the time of the novel. Another reason Mrs Bennet might not notice how little he thinks of her.
As far as husbands go in that era (the bar was on the FLOOR) that isn't actually a bad deal from Mrs Bennet's POV. She has so many benefits from the marriage, and almost no drawbacks that she notices. Ignorance is bliss. And most of the drawbacks that she does notice - their impeding 'ruin' should Mr Bennet die, not travelling to Brighton, his complaints about paying welcome calls to Bingley - are, respectively: also her responsibility and fault and forgotten as soon as she's happy again and she continues spending money; unfeasible; or forgotten as soon as Mr Bennet does what she wanted and she's inclined to see it all as a joke. We see her both happy and annoyed at her husband, but never feeling hurt by him.
I'd say that, even though it's objectively a dumpster fire of a union, Mrs Bennet is very happy in her marriage and justifiably self-satisfied. It's a far better life than anyone would usually predicted for the pretty daughter of a country attorney, faults and all.
As far as she's concerned, there's no failed marriage to reflect upon, nor reason to be concerned her daughters might end up in her situation.
