Then play better games. There are tons of great puzzle games that make you think, sandbox games that encourage creativity, story games that deal with heavy emotions, strategy games that train tactical reasoning.
Too much of anything is bad, but you can do a lot worse than video games.
Depends on the game tbh. Online PvP games are terrible for you because you are interacting with toxic scum all day most of the time. Isonzo has been a pleasant exception where the community is usually fairly nice. But most games it's awful.
I expect something like Factorio is pretty good for your brain.