He created the App Store fiefdom which taxes developers more than their government. It also compelled them to price their work at less than the cost of a cup of coffee.
He turned the general purpose computers in most Americans' lives into locked down, tightly controlled "experiences". (The iPhone, which lacks the ability to install whatever you want.)
He created an expensive laptop that isn't user upgradable.
His company is now suing a mom and pop healthcare app for having a logo shaped like a pear, which seems par for the course.
He sold status and glamour, and he wasn't a very good person. You can praise him if you want, but I think he's the epitome of selfish and don't consider him a role model. If you have to behave like that to win, it isn't worth it.
Gates, for all of his flaws, is doing really good work to make this world a better place. I look up to him instead.