Agree totally with not a monster.
Why have you not changed your name yet? Of course you are not a monster!
My very elderly mother, the result of total neglect combined with being put on a pedestal and told she was the cleverest person in the universe, often tells me that 'that's normal in families' if I question any of her relationships with the rest of her family. Well it's certainly normal in hers! They all hate each other and any one else outside the family is beneath them.
My sibling has N traits, and other PD behaviours tending to the hysterical end of the spectrum.
My father was just impossible to deal with on any level, and I remember him often yelling at my mother 'you are insane'. Seeing it all so clearly now 50 years later, of course he was right!
And yet, miraculously, I seem to have escaped the curse and am normal! I can say that with authority after years of psychotherapy!
I think borderline PD must be very distressing for its sufferers as you are aware that something is not right. At least a narc has no self-awareness whatsoever, and so has no suffering in that regard.
It has been said that narcs can have short blasts of self-awareness during an acute crisis, and I have actually seen this myself. But they go back to 'normal' afterwards.
Our society rewards Narcissistic individuals, and so there is no prospect of it dying out any time soon. And as for a cure - well how would you ever know they are cured? Everything that comes out of their mouths is a pack of lies, designed to manipulate and keep their false self from toppling.
Some one asked up thread if MH professionals have this debate re nature/nurture/where on the spectrum/differing PDs and yes they do.