The man is smart; otherwise he would not be a CEO. Just because you (and I as well) dislike Microsoft does not mean that he is an idiot.
He has anger issues, yes; but that also does not make him an idiot.
Steve Ballmer is a dorm marte of Bill Gates. They lived on the same floor.
After Ballmer became CEO, Microsoft's market value stagnated.
FYI, Steve Ballmer is smart alright, here he laughs at the iPhone:
http://www.youtube.com/watch?v=C5oGaZIKYvo
Note, in the competitive markets, none of the Microsoft attempts at
copying Apple products were successful:
https://forums.macrumors.com/threads/843845/