To quote my therapist it’s a waste of time trying to figure out why people do what they do, you may never get an answer. Diagnosing others also is usually a waste of time.

It doesn’t matter if he is narcissist or is he just a jerk or is suffering while being a jerk or is he egotistical or if he was abused etc All it matters that he isn’t a good dating or relationship material for you and it’s wise to stop communicating or going out with him.