you need to learn what a personality disorder is first
my short version is it is about self image and expectations of others and that being contrary to the rights of others
everyone has illusions about themselves but some people are completely convinced and it shapes their behaviour and leads them to do evil things
when that evil is to the self, ok, i'm not gonna judge that, that's a cost inflicted on the self
but when you do it to others, become aware people find it a problem, and continue
personality disorder