He’s really awful too, or at the very least he used to be.
He’s done a lot of rebranding himself as being a great guy as of late, and put his money towards some great causes.
But when he was in charge of Microsoft he’d openly treat people like shit, openly steal things, openly do anticompetitive and illegal business practices, deliberately put small companies out of business, and openly bribe politicians to look the other way as he built his illegally-gained business empire.
The technology landscape today is vastly more closed and monopolised because of his/MS’s actions.