If you're full of yourself you're openly hurting others, and you most likely won't change. People like this often stay being narcissistic. People who hate themselves are overall more likable, but are easier to help because they see the problem and acknowledge it. It's much easier to help people who hate themselves and know about the problem rather than those who are full of themselves and see no problem. To them, you're probably just jealous or something dumb like that.