From my personal experience, playing computer games is a dopamine hit, but they don't result in me feeling particularly relaxed afterwards - often I'd play too long and feel tired, a kind of a hangover.

Try a different style of game. One which doesn’t reward stress. Alto’s Adventure added a zen mode so it would be even more relaxing to those who are playing it to chill: https://www.theverge.com/2016/6/1/11785058/altos-adventure-z...

And crypto does not have a positive impact on people "playing" crypto?

Sure, just as gambling does.

You should compare energy usage of Bitcoin to gambling, not gaming.

Sure but the energy expenditure per-person isn't balanced per person for crypto, it's balanced to the amount of energy and money willing to be spent on the thing. If I "enjoy" crypto to the tune of a $1 million dollar server farm, that'll burn ridiculously electricity than the biggest possible monitor and the most powerful GPU available to power one computer for one gamer's enjoyment.

You can still be relaxed after losing a game, after losing crypto not so much.

Isn’t it a zero sum? If one wins money, one lose some.