Narcissism is a lot worse than the description implies.

Narcissists are abusive, destructive to the people around them and even a danger to themselves/people around them.

They do things like:

speeding up to deny other cars passing, railroading them into oncoming traffic (my grandfather)

Lie, cheat and steal a $550k inheritance from me (mother)

Ask you to start some pot plants in their shed while they're away and then tattle to mommy/police when they get home, so they don't have to share it and they can keep materials you bought (brother)

And if you confront them as adults about it they'll try and convince you that you're autistic and not in your right state of mind, 'it was all for you!'

I'm fairly serious about my offer, if someone kicks my brother in the nuts hard enough to make him sterile, they can have what I did get in the inheritance - a sun of cash around ~1000, but shorted $140 because someone else's money in my family's hands means free shit for them, you don't care, it's free money anyway!