What are some things that just get under your skin about games?
For me, it's games that do not allow controller rebinding. I have neuropathy and my fingers don't all work. If I can't rebind buttons so that I have necessary moves (for example: parry) be on buttons I can reliably press the entire game becomes unplayable.
And on console, where I can't refund a game after I downloaded it (fuck you Sony) then it really screws me over wasting what limited funds I have on games I just can't play.
unpausable cutscenes. Nothing bugs me more than getting interrupted in the middle of a cutscene and not being able to press escape to pause the cutscene. You're forced to try to split your attention between what interrupted you and the cutscene or restart and see the cutscene from the beginning again.
Extra annoyance points if escape immediately skips the cutscene without any indication it's going to.