Thank you for the answer and sharing your experience! I'd like to talk a bit about the things you talked about, partially to share and partially to ask your opinion, I guess. My apologies if this is oversharing or insensitive. I think talking about the "brain sex" and dysphoria being distress from having "brain map" of one sex while physically having another, basically a neurological condition would be really beneficial, because, I think, it explains things better, while others, including the ones you mention, still leave enough room for it being all the things people who deny the existence of transgender say. I have only my own experience, of course, but, for example, the disassociation part... I have had depression for years, and during particular bad periods (months) I felt life like watching a movie. Or the name and pronouns things... I don't like using my official name, never really felt like it's about me, I suspect because my family never used it (they wrote into documents a female name and called me a boy's one). Speaking of pronouns, I once got into community that used only male grammatical (the language wasn't english), female one was used only as insult and if you used it for yourself it was basically like saying "Hi, I'm stupid and you can treat me like an idiot with in invalid opinions". At first it felt a bit weird to talk of myself as if I was a guy, but then I got so used to it it felt weird to use female grammar and I had to relearn it. Not going to lie, still feels weird sometimes. Also I happen to be what people call GNC now, of sorts: I dress "masculinely", work in "male dominated" area, have "boyish" interests, "think like a man" (that was something to be accepted as a compliment), was uncomfortable with female characteristics of my body (because having breasts is slutty, having periods is dirty and something to be ashamed of, the usual)... I guess some people would say that I'm trans guy in denial, but I don't think that, I'm good with how my body feels and I don't think all the "GNC" things have anything to do with gender. What I try to say is that it seems to me sone things trans people use to describe their condition can look like symptoms of other things, from depression to internalised misogyny or homophobia, so I guess raising awareness about the neurological side of things would be beneficial for all, including people who are confused about these things.
A lot of conditions have symptoms that overlap with symptoms from other conditions. There are a ton of different conditions that can cause disassociation, there are even different conditions that can cause types of dysphoria/dysmorphia. The difference comes down to what the root cause is, which really just translates to what treatment can a doctor give you that actually gets rid of the symptoms. In my cause transition gets rid of the symptoms. In your case a somewhat forced transition didn't really solve any symptoms, just changed how society treated you.
There is a large group of people who insist that being trans isn't, by definition, about having dysphoria or brain sex. So you don't hear many talk about it because even those of us that do believe in having dysphoria to be trans, and brain sex, end up not talking about it as much just to avoid the drama of being screamed at by people who think you can be trans just because you said you are (as in, possibly living exactly as you were while saying your cis, but now saying your trans, or only changing some gender role type things and saying your trans).
But even with there being less talk about brain sex and dysphoria, theres a lot of people who learn about it from just knowing someone whos trans. Because even if the person themself doesn't really mention the words dysphoria or brain sex, they can still see and hear about how that trans person does things like bind or tuck, and see how clear it is that its about the body, not gender roles. I agree it would be great if we could just talk about brain sex and dysphoria. But with the state the world is in about that, our biggest way of making an impact is existing and showing that existance. When people see people like me, people who clearly are trans because of the body being distressing, and not because of gender roles, they see the truth, that being trans isn't about chosing gender roles, or chosing at all. Because even though yes they'll see I'm not holding to the gender roles of my birth sex, they can also see that thats not what I focus on. They can see that I've done things to change my body, done things that if I wasn't uncomfortable wouldn't be worth doing.
So I agree it would be great to be able to talk about brain sex and dysphoria more, I disagree that its necessary. Symptoms rarely belong to only one disorder, that fact just needs to be more well known. Those who argue about the existance of trans people may be able to try to pin those arguments into still working on someone whos dysphoric, but if they even hear about dysphoria they'll be pretty unlikely to actually bother focusing on that over just continueing to argue about those who claim to be trans and claim not to have dysphoria. Because if they've heard about dysphoria that means they've listened to a trans person talk, and if they're listening they'll also hear them say the reasons that dysphoria isn't just some over reaction or a different disorder disguised, but rather just another medical condition. Transphobes, despite having access to information, are still focused on the type of person who says they are trans, but either doesn't transition, or just does some gender role type things, name and pronouns, and maybe starts hormones thinking they can pick and chose the affects. They could focus on and argue about actualy dysphoric people who need to transition, but mostly they don't.