Trump's problem is called metacognitive deficit.  He doesn't know what he doesn't know, and doesn't realize that there are plenty of people who do know, and who therefore see right through him.  People with metacognitive deficit habitually overrate themselves on tests of intelligence, knowledge, ability, etc.  Hence Trump's ridiculous statements about his speech at the Capitol, the crowds at his inauguration, etc.  He literally does not know that his inflated self-rating fails to account for all the things he doesn't know and cannot do. Once in a great while he exhibits a sliver of insight, e.g. when he admitted that "fixing" the ACA was harder than he thought it would be.  But then he forgets, or fails to learn from, this lesson.  Scary times; let's hope his senior advisers don't let him use the nukes.