They could be the same feminist who write on social media. Some of them. They can have a happy live with a feminist man who support them as equals. And at the same time, they can be angry towards single men who mistreat other women (or them). Live is like that.

But many times when feminist complain about something specific, some single men falsely say that "all men" do that. As a result, they don't conceive that the feminist that complain about that, might like other men who never have done the thing that bothers them.