Also this is slightly unrelated, but I wanna put this out there. My ex, like a lot of girls, was extremely insecure about her appearance. It's a shame because she was very attractive and had modelling agencies chasing her all the time, but that's not the point.
She was extremely insecure about her appearance and always worried about what others thought of her looks. Despite this, she was still unbelievably judgmental of, and rude about people she considered unattractive. She wouldn't even go up to these people to tell them what she thought of them, but holy shit it's honestly such a disgusting trait to see in a person where they're so insecure that talking down others makes them feel better.