Yep we face it all the time in our group, we get the manosphere making nasty and/or anti trans remarks or passive aggressive trolling. That's why posts like this have to be flagged as women only so they've got no excuse. We're ruthless with the ban button though so its manageable.
It's really sad cos we've had so many incredibly supportive men cheering for or quietly upvoting us. I don't remember reddit being this bad but I think you're right, they stuck to their own areas.