I hate lots of things. First off, I hate having to walk back and forth. If a character gives me a quest that requires running a mile to a dungeon or something, then I have to do the dungeon but then run all the way back to the quest character, then the game can get fucked. If the world is really interesting and run speed is fast, then I am fine with it. But otherwise it is obnoxious. Underrail got uninstalled in 10 minutes because it had far too much running back and forth. Fuckers.
I also really hate having too many containers in the world with stuff in. NWN was a fucking nightmare with this. You leave the first building and there are 4 barrels, a chest, 3 crates, and a plant pot, all searchable containers, and that's just in the first corner. And there are 10 corners because the area is a weird shape. If you ignore them then you end up broke and lacking in scrolls and shit, and if you decided to open all the containers you find, you spend hours clicking the millions of fucking boxes. Terrible.
I also hate stories that don't let me skip them. I've never played a game with a story and dialogue that even came close to a good TV show, so they shouldn't force me to read/listen to all the crap that they came up with. It needs to be skippable and the number 1 dialogue option should be mashable. I might make an exception if the game is like BG2 with lots of interesting dialogue choices, but generally I resent having to read stuff because it always bad.
Most of all I hate fucking towns! Because they are the above 3 shitty things compressed into one massive waste of time. Having to run all over the place, search a million boxes, talk to a million shitty characters. I hate it so much.
Basically I hate RPGs unless it is focused on combat and the combat is good. FFT, Blackguards, TOEE, etc. I love that. I even liked BG2, Dragon Age Origins, etc. If the story is decent and skippable, the travel is minimal, and there are some good battles, then I am happy. I don't think I ask for much.