There are so many more... and it's not that the policies themselves are going to crush America, but they show how truly stupid the man is. Take the wall for an example... he's willing to spend billions if not trillions on something that has proven to be ineffective.
I understand his immigration policy, but how fucking stupid is it to choose the countries that he did? Countries that have not had a terrorist attack on US soil since the 1970's and he leaves the countries like Saudi Arabia out of it, the one's mostly responsible for 9/11. Sure, stopping terrorism is a good idea, but alienating tens of thousands of people to stop the non-existant terrorists from 7 countries that are a non-threat to anyone's way of life... again, no common sense. There are better ways to battle terrorism, this isn't one of them.
Trump made some HUGE promises when he was campaigning and has failed to implement 80 percent of them thus far. Many of them will never pass. It seems like the Trump supporters don't really care though, because he can do no wrong and will always have an excuse for being a complete failure.
Beyond policies? The constant and obvious lying to the public and to the media as well as his childish lashing out on social media expose him for what he really is: an insecure halfwit that is in way over his head.