Here's my complaints:
16:9 resolutions on a 16:10 monitor is bugged. Any 16:9 resolution you pick the game will stretch it out to 16:10.
Mouse sensitivity is screwed up as you say. One it is too sensitive and two it seems to move in y axis faster than in the x, so when youre walking you view moves up and down too much , and I'm not talking about the head bob.
If there are stairs that are part of a building you have to jump to walk up them unlike all the other stairs in your path.
Game is very linear in your choice and it is very short. I finished it in 10 hours yesterday.
During the game and in the menus I have to hit the enter key. I can't remember when I last had to use the enter to in a game other than for chatting.
The Menus are very dumbed down and simplified. If you want to get to the nitty gritty stuff you have to edit the ini files.
You cannot manually save. All saves are automatic and you dont know when it happens, which means if you die you dont know if those items you last picked up have to be picked up again. Also makes it harder if you just want to explore the place and not worry about dying because if you die its hard to keep track of your progress unlike if you could exactly when you wanted to.
These are the main things that annoy me about the game.