We aren’t built to be satisfied. Our survival in a prehistorical context depended on our constant vigilance in the face of the ever-present risk of death from myriad dangers. That has required of us to evolve into fearful, violent creatures. Nothing forces us to act that way in a safer, less existentially precarious context, but there’s a lot of hard-wiring for us to fight against. I think so long as you’re willing to face that skittish, aggressive, hoarding nature and try to calm it down and perpetually remind it that it’s going to be ok, you’re on your way to some pretty solid contentment.

Of course that first requires that you’ve somehow magicked your way to a reliably full belly and roof over your head, which… well good luck