I thought war 3's story was fine in a vacuum. Of course I thought all the stuffy characters were frustrating, and arthas went off the deep end a little too quickly.
My only grumblings were related to retcons of wc1 and wc2. Not that those games had some amazing story, but if I'm participating in a franchise I like consistency.
And the game deserves a rating of 0 if it literally doesn't work
You did indeed stab me in the back. However, you are only level one, whilst I am level 50. That means I should remain uninjured.