You never enjoy "just hanging" with people if you can't get anything from it.
You can't be happy for other people's achievements and only think about how to use them to your advantage.
You have no realistic non-superficial goals that could bring you fulfillment down the road.
You can be dominated by anger or fear and act out in a way that fucks you over big time.
You can never trust someone else.
You are prone to substance abuse.
Resisting becoming a misanthrope is hard.
Your greed can never be sated.
Your social needs are hard to meet because of the extra effort you need to put in to fit in.