Well it's true to be honest

There are a lot of problems regarding the UI and mouse + keyboard setup.
For starters you can't navigate the menu with the mouse.
Secondly the settings keep resetting to default values when you scroll down them using the keys.(why would i want 360 gamepad option on?)
Mouse Acceleration is enabled and has to be disable through an ini file.
Vertical Sync can't be disabled from the menu and has to be done within an ini
FOV is too low standard (like 60) and has to be set through an ini.
Mouse sensitivity is horrible. Looking from left to right I can do it in one motion, looking up or down takes 6 times as long.
So people are a bit overreacting, but a lot of these complaints are true unfortunatly