One of the things I most hate about TRAs invading fandom spaces is their awful habit of taking a female character, who is tomboy-ish, or maybe wears more masculine clothes than your average female, and using their stereotypical and misogynistic views to declare that, if this character is able to fend for herself than surely, that means she is a transgender.
Their invasion of fandoms has been quite brutal over the years. Part of the reason I stopped participating. But it really gets me mad to go back every so often, only to see them doing this to my favorite characters.
I didn't want to get very specific with my interests, because I worry that they can be easily used to identify me. And god knows TRAs love their doxxing and blackmail. Be as specific as you'd like, though. Do you hate what they did to a certain character? What frustrates you the most?