Are you sure you aren't getting mouse lag?
It might be partly that, down to performance though rather than the mouse... but it doesn't feel right even when my frames are high, the gun just goes all over the damn place and bullets go wherever they damn well please

On this point I agree with you definitely
It's like the moment you are spotted by the enemy, you player gets killed.
Heck even after being spotted by the enemy, I tried to move behind wall, but my player got killed in the process lol
They should implement CS Source gameplay.I just love it
Haha, that happens to me constantly. What the hell must hardcore mode be like?