Might help also to describe what you think feminism is, since it’s one of those terms that is overloaded.
I once had a physical therapist tell me she wasn’t a feminist because she thought women couldn’t be as physically capable as men when serving as soldiers, and seemed to believe feminism requires treating women exactly like men.
I told her I was a feminist because I believe in equal rights for men and women, an idea she did not seem so opposed to.
This isn’t really a gender issue, either, but I acknowledge men tend to be more of a problem here. But the solution is simple and egalitarian (or feminist, if you prefer): If you make a mess, clean it up. It also works in places besides the bathroom.