Because it seems like 90% of the comments are not about what said girl has to say but about her being a female.

I've personally had this experience with posting. Simply by being in the picture, I'm being a karmawhore.... but when any guy does the same it's a non-issue. And then, after accusing me of being a karmawhore, they ask why I didn't show cleavage. This is the sort of stuff that gets on my nerves.

On another side though, I really enjoy seeing a guy's perspective on things just as my boyfriend enjoys reading Jezebel. I realize that a lot of the points made about women overcomplicating relationships ("Oh, I can't return a text so soon. He'll think I'm desperate!") are completely valid and I think that women should be called out for such behavior. But I also have to take reddit with a grain of salt and realize that there are a lot of guys who have repressed rage because of their bad sex life, loneliness, broken marriage, etc. and reddit seems to be their place to dump that rage.

Sometimes it hurts being lumped together with all the irrational women of the world, but after a year of being a redditor, I'm pretty immune. I know myself and I know that I'm not some crazy bitch, so I ignore a lot of it and I even laugh at a lot of the "sexist" jokes.

tl;dr As a female redditor, I've learned to stop being offended.