Why do girls think they're better than boys?

I'm wondering why girls think that boys owe them something, it's like you have to give a girl something like a gift just to be able to talk to them. It doesn't even need to be said, you can't even get a girls attention in public unless you have something to offer what is with that, not only that but it's a proven fact that girls think they're smarter. I'm wondering where girls get they're ego from it's so hard to talk to girls in public, they automatically ume your a creep and only want . Just cause a girl looks good doesn't mean I want to hook up with her, some girls walk around with this bitchy look on they're face and if I make eye contact with them they roll they're eye's. I'm like are you serious I wasn't even think that get over yourself. I used to work with this girl and we used to have those discreet insults towards eachother, you know the ones where you don't actually say what you mean but are extremely insulting. We hated eachother but I can tell inside we could also the crap out of eachother out of pure hate. It was a weird flirty insulting kind of relationship ever have one of those.