It doesn’t matter where you go, you will run into assholes. Assholes are a part of life. The great thing about social media, though, is you can ignore them/block them and never see them again. You can’t really do that IRL, despite the commonly given advice against bullies (at least that I got growing up) is to ignore them.

You don’t need to do anything more than what you’ve already mentioned. Report them if they are breaking rules, and block them so even if they aren’t you don’t have to deal with them anymore.