Never enjoyed any type of 1st person games really. There's exactly as you said WAY too much going on.
I don't enjoy "open world 3rd persons games" either, including plateformers like Super Mario Odyssey, etc because even if the action is often less intense, there are still too many things to think about : staying alive, killing or avoiding ennemies, finding your way while having to be careful not to miss important places (that's a big one, I hate it), replenishing your stocks, all that in real time. Nah, it's just too much for me. I don't have the brain throughput for it.
I prefer games where the field of possibilities is narrower, like racing games, or 2D plateformers where you just have to go from start to finish.
Or management/construction games, or anything where you have time to think about stuff.