Seriously they're like a bunch of black clouds.
Most Helpful Guy
I don't think it's just this site but the Internet in general. The Internet has always been a haven for people with poor social skills or loners so there's a bigger chance that you'll come across people that struggle to fit in (and might be bitter about it) online than irl. Also, people are more likely to vent their negative feelings online than to or in front of people irl as there are higher consequences. If you harass or insult a girl on gag, you get your account suspended. Do it irl and you could get suspended from school or college or end up chatting to the police. This site can wind up providing opportunities for guys to rant at girls with less risk than irl. It happens in online gaming too I believe.
Also, this site is designed to cater for people struggling to understand the opposite sex. Some of them may just come here to rant and want girls to hear it.
Why there isn't an equal number of bitter girls on this site (which there isn't in my opinion, there are bitter girls here but less so than guys), I've no idea.1