Donald Trump seems to me to be a corrupt real estate developer, nothing more and nothing less. He buys politicians and does it gleefully. How could any person reasonably support him?
Well, in some respect (given what you've said), we either can vote for the one who buys the politicians, or else vote for the politician(s) who've been bought. My cynical side resonates with Mark Twain's quip. Don't vote. It only encourages them.