Now that it has been proven that Trump is a criminal and one of the 5 worst presidents in US history, why do people still support him?

They [b]don’t[/b] care. Some don’t believe their own eyes and ears, but mostly, they’ve decided that whatever Trump does will somehow benefit them (even with evidence to the contrary) so the ends justify the means. I’m not sure what would have to happen to shake them out of it.