
Avoiding them isn’t gonna do much as you’re not likely to play a game with them again anyway. Also why are you joining games and telling people you’re LGBT? You’re just asking for trouble. Block them, you won’t be able to voice chat with them which is pretty much all you need.
If you go around telling people you’re gay, eventually you will encounter people who do not like gays. You’re angry at statistics. Get rid of the flag and go anonymous like everybody else, or don’t, but you’re gonna have to grow thicker skin and block people more often.