I have a handful of suggestions, all offering the entertaining, cathartic escapism without putting too much demands on you.
The first category is the ARPG/Hack n Slash type of game. Diablo 3, Path of Exile, these are quite easy to play, offering the satisfying power progression and mass demon slaying. Loot is plentiful and you do not need to min-max them to have fun unless you're competing at the top top end. You can find dozens of builds designed and shared by the community which takes the guesswork/experimentation out of the equation too.
Second is colony/farm sim. Stardew Valley, Rimworld, Starbound?.they are relaxing to play, let you flex a little creativity, can be picked up or put down for minutes or hours and will absorb as much time as you offer them.
Survival games. These games offer varying levels of complexity, but generally you spend your time scavenging food/materials, fighting enemies, managing health, hunger, sleep and base-building. Don't Starve is different than most in the genre and an utterly brilliant game. Once you have the mechanics down, it's easy to play. It's not *easy*, but easy to play. Minecraft, Starbound, there are many great suggestions for these kind.
Sim games. Elite Dangerous, Euro Truck, X4. These let you freight goods through space/Europe. Elite Dangerous is easy to lose time in. Flying tourists around, freighting goods, making money. You could also consider Cities SKylines, Hospital/Rollercoaster Tycoon, just build fun places how you want. Civilization is not really sim, but strategy, but is a very, very slow easy going game.
Last suggestions are just general mayhem simulators. Just Cause 2-4, Saints Row 3-4, Dynasty Warriors (pre-open world). Blow shit up, parachute from helicopters, etc. You could probably include most Ubiwank FarCry/AssCreed stuff here as mindless action-schlock. You don't need much brain power to play those sandbox games.
Let us know what game you opt for
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)