I’m not sure narcissists really get better. Is that a thing? I don’t really know. In my experience, none of them have the self-awareness, seemingly, to seek out self-improvement to end their narcissism. And that’s people without billions allegedly to their name. In many cases it just seems to fly under the radar. Siblings, co-workers, parents, kids, spouses - they all eventually figure out there is something “wrong” with the narcissist, and that it is not actually them at fault. The narcissist usually perfects the art of gaslighting others into thinking they are imagining stuff.