Why do ugly girls think they're attractive?

I'm honestly really tired of this ****. I know that beauty is in the eye of the beholder most of the time, but the girls I'm talking about are complete abominations. They are disgusting and so fat and ugly. None of them know how to dress or apply makeup on. The only thing they know how to do is flaunt their chubs. Like sometimes some fat ***** will talk to me in school and I have to find ways of blowing her off without being insulting so that she doesn't get her fat friends to eat me. Anyway, I'm wondering why in the hell these repugnant girls think they're so attractive that they think they can get a guy like me and also put up thousands of pictures of their ugly faces from well-picked angles that hide part of their disgusting features on facebook?