I tell them I don't want to play with yall because you're rude and don't respect me, but they respond with well it's only your fault that your choosing to isolate yourself from us, and things like that.
Oooooh, what a gaslighty, dismissive phrase their response is. I truly
truly hate that for you.
Simply put, your brothers aren't entitled to your time if they're going to disrespect it.
I can possibly attribute your brothers' micro- and macroaggressive statements and actions to ignorance.
Most likely you are the first trans (or even LGBTQ+) person they know, and they have no clue how to treat trans people with respect.
You're not entitled to educate them, of course, but that's the only reason I can think of why they think those kinds of words and actions are even remotely acceptable.
If I were in your shoes, I'd continue to hold firm to my boundaries for sure, like you are doing now.
Most likely your brothers don't know
how they're being rude and disrespectful
.
I would be as specific as possible in saying to my brothers exactly
what they are doing that makes me feel bad.
This would sound something like "It makes me feel bad when you say '
who's that?'" or "I feel like I'm being ignored when you don't respond to me." or "It makes me feel bad when you call me 'delusional.'"
If they listen, that's great!
BUT if they try to turn it back on you (think of statements like "Stop being dramatic!"), I'd dryly respond with a "Hey, I told you what makes me feel bad. If you're going to ignore that, then now you know why I stopped spending time with you."
Rinse and repeat as needed for as long as your brothers continue to disrespect you.
If they never learn their lesson, then they can only blame themselves if you decide to go No Contact with them once you start living on your own.
I'd also start gradually opening up about these big emotions to my grandma, since she's the biggest support system at this moment who also understands your family dynamic.
You don't have to tell her everything—you can take it a little at a time as you feel comfortable.
You can even start with bits of what you posted here!
Growing up in the 2000s as a gay kid in a violently homophobic environment, that's what I would have done in retrospect.
I'm sorry your brothers are giving you such a hard time, though. They suck and, frankly, they sound immature. BUT thank you so much for letting it all out here.