FPS games, I have bad aim and get nervous, which leads to feeling insecure very quickly.
Any kind of MOBA, I'm very inexperienced and fold very easily to the idea someone could call out my lack of skill with toxic behaviour.
Fighting games, getting locked in a combo is incredibly discouraging and I'm not willing to put in the time to learn combos or moves myself with how precise everything is. If I feel like a game requires me to know the frame data of every attack I use/get hit by it doesn't matter how many cute girls are in it, I can't play it.
And tactical/strategy RPGs, I'm not great at planning any kind of move ahead of time, tend to just do everything on reflex, and all of the different things I feel I have to memorize can feel daunting if I'm not already a veteran of those kinds of games.