He might be a bad president, or a nutjob, but that doesn't mean he's an idiot.
He might be a business man, and making a lot of money from the presidency (secret service renting golf carts from his golf course, is actually making him money, while spending the secret service budget faster than any president before him - as one example).
He might have plans to distract from his actions with big rhetoric, or he might just want the people to celebrate his 'greatness' - hence his constant pandering to crowds of Americans in campaign style rallies - despite the campaign being over.
I don't think he likes being president, but he's admitted that being presidential is an act for him. Just a facade he puts on that goes with the job (and as a reality tv star he is almost certainly used to putting on these kinds of acts... I'd argue his whole lifestyle is an act, the 'rich guy' act...)
Whether it is a distraction, done for tactical reasons to keep the media focused on his 'gaffs' and 'controversies' while in the background the federal agencies protecting the people (like the EPA and CDC) are stripped of their ability to function, and wealthy business men gain huge control and influence.
Or whether it is just a neurotic man, doing his best to keep everyone happy while he acts like an idiot at times to put people at ease... I don't know.
But i'm not convinced he is an idiot. I think his priorities are fucked up, and he's rather childish at times... but i can't tell how much is an act.