But constantly flipping out over anything he says or does is cuckoo
"Flipping out" is perhaps hyperbole. I think most reasonable people look in awe at the avalanche of stupidity that dribbles out of his mouth.
For example, just 2 or 3 days ago in addressing Hurricane Dorian he said that he "doesn't know what a category 5 hurricane is" and that he "never even heard of that term before". Why?
Of course there are videos of him discussing the impact of other cat 5 hurricanes in the past, and addressing them as such, and of course this but one small example of a daily ritual of playing hide-and-seek with the truth.
Now you ask... what is the point about lying and misleading about something so inconsequential like that? The man has a pathology that is hard to understand, but at the very minimum it shows that he cannot be trusted even with saying the truth about the most mundane and trivial things.