Every fanbase can be toxic as long as they do not respect the original creator or other fans who like whatever they like.
I love Genshin Impact for example. In this video game the characters are very beautiful and the shipping-fanbase has gone crazy. While I respect nicely drawn pictures (subjective, yes), I also stay away from stuff I do not like to see. If I stumble across something like it, I scroll further and ignore it.
So I try to be the fan I would like to see in any fanbase. 🙂
Respect for all! 🙂