Most of the so-called "feminist" subreddits are run by men who pretend to be women, so that's not surprising at all. These men have a habit of worming their way into every online women's space and, if they can, taking control of the discussion. Reddit is especially terrible for this, and the only way for women to protest this misogyny without risk of having their accounts banned is to downvote.

What do you mean when you say "men who pretend to be women"?

I understand this is a fraught question, and I'm not trying to be snide or score points. Given the specifics of the post you're replying to, I think that's a germane thing to clarify here.