You're missing the point - it's not about control of th narrative, not really. Everything they do is a coping mechanism. It's about protecting themselves from the agony of cripplingly low self esteem. The sort of self esteem that is so poor that they would have a catastrophic mental breakdown if they had to face it. So they are constantly in competition with others, creating competition where none exists, constantly putting others down, manipulating others into agreeing with them, finding people to bully, playing the victim (because this gives them status). They need to constantly prove to themselves that they're not just as good as other people, they're actually superior, to drown out the little voice in their head that keeps telling them they're shit.
Where it's difficult for those of us who actually have narcissistic parents is that their view of the world is the one we are exposed to as children when we don't have enough life experience to know any better. We are their prisoners. We have to somehow get our basic needs met so we develop behaviours and survival strategies that often involve appeasing them or accepting bullying without complaint. We don't know this isn't normal because it's our normal.
We then have to build ourselves from scratch as
adults, unpick these behaviours, and allow ourselves to accept our parents as they really are, which can be terrifying and painful. It's a uniquely difficult situation to be in.
To understand the narcissism you have to ask what the control is for. Why they need to cling to a particular narrative, blame everyone else, be treated as special, love bomb and then destroy. It is all about proving they are better than other, because they can't cope with the alternativs,