She must have a good reason for it, so why is radical feminism so bad? I don't really understand a lot of political stuff.

So, I saw an account from a friend that said "Do not talk to me if you're radical feminists (radfems)". If it's because of TERFs, I understand, but what about the rest of radical feminism? I sort of understand what it is but not why it's bad to want to change the system and defeat the patriarchy or whatever.