Generally thinking you're better than someone leaves you coming off as an absolute twat. You don't claim to be better than people, if you have empathy, as you wouldn't want them coming off demoralized. Constantly parading yourself as being better than someone doesn't make you better, it makes you a twat. You can show you're better and be better but promoting you being better? Dickhead.
Why shouldn't someone feel they're better than others? It's a form of boosting one's self esteem. There isn't a damn thing wrong with someone feeling they're better than others. Do expect people to parade around and say shit like "Oh hey, you're better than me"?