I don't think Ballmer is hated. People think he is inefficient. And upto some extent, rightly so. But in no way he deserves what's dished out at him in all those grudgingly written blogs by people who couldn't make anything out of themselves.
It's Ballmer. I have been downvoted for the comment, but no one ever has given a strong reason as to why Ballmer is a bad CEO. He is not a very good one, that I agree, but he doesn't deserve hatred, does he?