Self respect is the most important quality in a person. Unless one respects himself, he cant respect others. It is even worse when ego centric people lack this very quality of selfrespect, which can be distructive as they would go around demoralising others for no reason!
An advice for such people: stay out of my life (for that matter from any human's life; you deserve to be in an asylam)!

The one who never forgives, never forgets and the one who never forgets never forgives. Its better to kick such people out of your life at the earliest. I've done the same!