As the son of a narcissistic father you never feel that you can measure up. Dad was so competitive, that he even competed with you. (Or, didn’t pay attention to you one way or the other.) You may have accepted defeat – you’d never outdo your dad. Or, you may have worked hard to beat Dad at his own game just to get his attention and some semblance of fatherly pride. You somehow never feel good enough even when you do succeed, you still feel empty and second rate.
Just like girls need to be adored by their fathers to feel validated, boys also need their dad to believe in them. You may even become a narcissist yourself. This way you get Dad’s attention (after all imitation is the highest form of flattery); and you learn from your old man how to manipulate and use people.