May be a controversial opinion from what I'm seeing online but I think Jax is actually good trans representation for what people are actually like when they try to repress instead of accepting themselves. I have been openly trans for about a decade, was on hormones for almost a full year, and one of the best things you can do for yourself when you're like that is meet other openly trans people. And because I've done that, I can confidently say, a lot of repressed trans people, are HUGE PIECES OF SHIT before they come out. I wanna be clear, this is by no means the universal experience, because being trans like being human is not a universal experience.
I knew a trans person who before they came out was a huge racist because they fell into the 4Chan trap. I knew a few who were mysoginists and incels before they came out. A lot of repressed trans people have a tendency to fall into bad crowds that feed the worst parts of them. And Jax is a perfect example of what happens when you try to deny, repress, and smother a part of yourself. When you try everything you can to ignore it. To snuff it out. Oftentimes, hurting ourselves hurts the people around us more than we intend to, realize, or even see.
I found Jax to be such a fucking refreshing change for trans rep because they weren't the fuckin butt of a bad joke. They weren't some "you had sex with a man" joke or "ladyboy" like I often see in the media or some snowflake "it's ma'am" joke. Jax wasn't some cis character that was YEARS LATER retconned into being trans. Jax wasn't literally a man wearing wearing a tutu or dress like I see in anime. Jax wasn't a femboy or a trap. They weren't sexualized or fetishized. They were just a person, struggling with two parts of themselves that couldn't find common ground. And that is by far, THE BEST TRANS REP I HAVE EVER SEEN IN MY LIFE. They were so relatable and even the parts I didn't specifically relate to, I knew actual people who could and had gone through those phases in their life.
Jax isn't bad representation. You just don't know enough trans people to see the parts that resonate with people. And if you still don't believe it, the creator has confirmed it multiple times.
the "issue" with jax's character arc is that its ugly. its unpalatable, especially to mainstream performative mental health awareness. but worst of all, its realistic. and refusing to engage with a realistic story because you personally dislike the character is willfully ignorant