While I agree with the overall take of the tweet, going on Twitter just to see korra being compared to catra, stolas, and Jax is insane to me. Compared to the other 3, Korra hasn't really done much wrong.
This is the case where two things can be true at once. Queer characters should be allowed to be flawed and messy and even overall bad people. But also, Korra just isn't comparable to the rest of these characters.
Korra's worst grievance was losing the connection to the past Avatars, something that wasn't even wholly her fault. She was lied to and manipulated. Even if you argue that she should have listened to her dad and Tenzin, she had no reason to think her uncle was plotting against her.
Korra was never malicious or intentionally tried to cause harm. She was arrogant and had a temper, but always tried her best to do the right thing.
(I've also made a few posts that Aang's done a lot of the same things that Korra's done and has gotten nowhere near the same amount of hate. The Legend of Aang movie proves this)
Catra has willfully engaged in colonization and tried to destroy the world because of her own feelings of inadequacy. She's purposely hurt a ton of innocent people, most of all Adora. I actually don't hate Catra or even her arc (I think it was rushed, but I don't have many complaints about how it was executed. I think had it been done over more than a season it would have been more meaningful), but c'mon. Comparing her to Korra isn't even legit. Azula would be a much more apt comparison.
Jax intentionally hurts people because she's afraid of letting people get close due to what happened when she (presumably) came out to her mom and as a coping mechanism. I think it's also important to remember that it's implied that Lee put on the headset either during or shortly after that night. Jax was quite literally created when Lee was at her worst.
Jax is supposed to represent that even bad people are still human and deserve to be treated as such. You're not supposed to defend her or make excuses for her. You're just supposed to remember that she's a person.
Which again, isn't nearly the same vein as Korra. Korra isn't a jerk on purpose nor does she treat people like they're beneath her. She's abrasive and gets angry, but as people have pointed out, she usually has a legitimate reason to be angry.
Stolas is a neglectful father who uses monetary leverage to coerce a lower class citizen into sex. And the show he's in tries to make everyone else the problem. Korra would never.
(Catra might be the most morally wrong out of these four, but in my personal opinion Stolas is the worst)
All this to say that even people "defending" Korra make her out to be worse than she is when they make these posts. Korra suffers from unfair treatment when compared to other characters, these three are actually bad people who have done purposeful damage to others. Putting Korra in the same category as them is a disservice to her