Fighting games, hands down. Even games like KI which have auto-combos are still very difficult. It’s not something that I think can or should be changed, though. They’re hyper competitive games and should be allowed to be what they are. The only accessibility things I would expect from the genre would be visual, as it would help people with vision issues like colorblindness. I feel like mechanical changes would ruin the thing that makes those games great. RTS-style games are difficult, too. I used to play a lot of Dota(2400 hours), but with my left hand continuing to decline, I had to give it up. I just felt like too much of a liability to teammates.
So, the back paddles on the elite are great. I can only use the right side ones, but I typically set them to X and Y because it’s hard to quickly get to those two. I then set X and Y to both of the stick clicks. Most games I play don’t use the stick clicks for critical functions(I play shooters on PC.) Some games, like EA NHL, I have completely customized profiles for.
The fact that console games usually prevent wholesale rebinding is incredibly stupid, imo. I understand that design and input go hand in hand, but there are a lot of games that are bad because of poor control layout that could potentially become good games if the designers weren’t so married to their vision.