Trump got successful not because of great business acumen but of luck, he has an inflated sense of his abilities. Trump had been the most divisive, chaotic president for the last 50 years, this guy cant even manage his own cabinet.
Trump is Biff Tannen from Back to the Future - Part 2.
He cheated his way to wealth & power. He is loyal to no one, no oath & it's no surprise that no one is loyal to him.
There is no deal that he hasn't mucked up, he's been involved with over 6000 law suits, he's gone bankrupt 6 times. he's stiffed his contractors & vendors & he cheated charities out of pledged donations.
You're right that he can't manage his own cabinet. And what a cabinet it is! The BEST people?
Pres Obama had a nuclear physicist as his Secretary of Energy. Trump appointed Rick "Oops!" Perry who has a bachelor's degree in animal husbandry.
And Perry is the one who hasn't been caught with his hand in the cookie jar - like Elaine Cho of Transportation - $100K spent on private planes in less than a year? Wilbur Ross, Ryan Zinke, Scott Pruitt & Ben Carson have all spent millions more than their predecessors on REDECORATING & Travel. These people are pond scum growing on balls of the microbes in Trump's Slime Swamp.
That Biff Tannen reference is actually quite true. Even Zemeckis stated years ago that he based Biff's alternate 1985 self off of Trump. That's why we had "Biff Tower" and that hair and womanizing.
Zemeckis was quite ahead of his time on that one.
Funny thing is--I could see our country looking very much like that alternate 1985 if Trump were ever allowed absolute power.