I think people in his administration stopped him from doing some really egregious things. I'm sure some of the things his kids or son in law and related people did, were given the green light based on his bottom line. Knowing the kind of person Trump is, "What's in it for me?", it is safe to assume that someone with that kind of attitude and a history of being a shady kind of guy who doesn't like paying his bills, it seems like he had done that.
If he manages to gain power again, he has blatantly said he is not interested in properly governing, just planning on his revenge against people he doesn't like. That doesn't sound like somebody who should be president.