he doesn't know anything about modern computing. He can't even demo his own products successfully, which shows he just doesn't give a damn. He was good at "business" of beating up other companies and Canoodling government and enterprise bosses.
He's also spend decades selling down to only a few percent of Microsoft ownership. He's still the "biggest" owner but not by much. He needs to "go away" and let the company do it's thing. His time is past. He should have got his nose out a decade ago and allowed Ballmer to fail hard. he's just a doddering old grandpa that won't let the sons run the family business correctly.