Try getting your games from F-Droid instead of the Google Play Store. Although a lot of them might still be bad, because everything F-Droid offers is required to be Free Software, you can at least be assured that they're the kind of bad that comes from the amateur dev not knowing how to make a good game, not the exploitative kind of bad that's a glorified Skinner box designed to addict you and extract microtransactions.

Games from F-Droid that I like include:

• Shattered Pixel Dungeon
• Mindustry
• Endless Sky
• Feudal Tactics
• Vector Pinball

There are also a bunch of the usual traditional sorts of games: card games, tetris, chess, etc. l won't recommend particular ones for those since it basically comes down to personal preference, but I'll point out that you can pick any of them without worrying about them being infested with ads and shit, unlike in the Play Store where trying to find that one implementation of Solitaire that doesn't try to monetize you is like finding a needle in a haystack.