You’re making a pretty big leap there. Not all games are GTA, in fact, very few games are GTA.
You’re missing out on some truly remarkable games with that outlook. The Legend of Zelda: Breath of the Wild is my current go to for “best game ever.” There’s the creativity of Minecraft… so many options. Don’t let your playing a few bad games make you write of gaming as s whole.
As for this, D&D already gives your character the ability to worship fake deities, so this isn’t particularly surprising. These sorts of things are common in tabletop RPGs. Doesn’t make them good or anything, but I’ve played multiple RPG’s, and the easy solution is to just not incorporate troublesome mechanics if you think they’re a near occasion of sin for you.