Why is it so easy for some guys to get girls?

You're describing him as an asshole. If he is a big asshole to the girl he is dating, then she probably has little self worth. Most girls who don't think highly of themselves date mean guys. I would date a guy who wore "rose colored glasses", he would probably be fun to be around and not such a downer!

Well its not like he can get girls, he has ONE girl. Who is probably (the only one) putting up with his angry pessimistic attitude.
OR
Maybe he is just different with the girl he loves. Maybe he turns into a flower when she is around :)
I've met a lot of guys like that. Who acts like an asshole infront of other ppl, but is the sweetest guy to his girl.
My boyfriend is the same way. And Iv never understood it. A lot of people he works with don't like him. Because of his character. And from the stories he tells me, I'm really sure I wouldn't either. But I'm not complaining because he treats me like a queen.
So maybe he is just different around his girl. If not, then maybe he just got lucky with a girl who wouldn't mind putting up with his crap.

hahahaha! I'm laughing because I can't count how many times I've been called a "crazy lib" or a "bleeding heart liberal" haha. Anyway to answer your question, no. That's ridiculous. We don't prefer angry pessimistic men. Maybe he's not so angry outside of work. Or maybe she has low self esteem and thinks he's the best she can do. Anyway, as a general rule, the answer is no.

I love it. Kissing, cuddling, touching. I've done it for hours, and love doing it whether it leads to more or not.

Sounds like he's a go-getter that gets what he wants because he doesn't pussyfoot around in life. He's alpha, carries himself as such, and that's the stuff women respond to.

not necessarily he just happened to find a nice pessimistic girl who hates the world as much as him.

I think there's a layer of women who appreciate those of us with strong opinions even though they probably don't agree with them all the time! I know many of my girlfriends have been in that category.they appreciate someone who is willing to take sometimes unpopular stands.

Of course there is a wider circle of women who want NOTHING to do with men like us.but we don't particularly care.