(Apologies to anyone for whom the the thought of the President laying hands on anyone causes a shudder.)
Trump has essentially turned the White House and senor administration into a personally-run small business, in a way that hasn't been seen since early 19th Century (at a time when the US was a fringe government on the edge of the wilderness, not a focal point of global economic and military strength). All decision-making roads lead directly through Trump; all policies are expressions of his own zany whimsy on any given day. There is no institutional continuity, no delegation, no barrier, no inertia. Trump simply marginalizes, then fires, anyone who gets in the way of his doing his own thing. He's running the government the way he did his businesses.
Which some people probably sounds like a great idea, except for when you look at how Trump's businesses have actually done, versus the personal wealth that Trump has managed to accumulate on the backs of business partners, subcontractors, banks, bankruptcy courts, and anyone else who's been willing to give him money or shelter him from the consequences of his actions.
A 61% turnover rate in your organization is a sign that you're a crappy manager. Unfortunately, there's nobody left but the US voter to pass that message on.
John Kelly, Scott Pruitt, and the Epic Turnover of the Trump Administration | The New Yorker
What does the endless death watch for the President’s chief of staff tell us about the worst-run White House of modern times?
Micro-managers are never good at business. As one person cannot remotely handle so many different jobs, eventually every single area ends up lacking in excellence. Employees lack motivation, as they are instilled with the "I'm not going to do it because my boss will just end up re-doing it or doing it for me" attitude. Additionally, without the expertise and experience, the micro-manager does everything he thinks is right, ignoring the consulting of actual experts in each field.
Add to that, Trump's incessant need to demoralize anyone who stands in his way, and you end up with high turnover
I am again struck by the parallels between Trump and Jimmy Carter. Of course, the parallels aren't perfect – if you TRULY want to look at the so-called "art of the deal," just look at the Camp David accords. But Carter also got a reputation as a micromanager (the linked article includes details on the famed tennis court story), and sometimes reveled in his status as an outsider.
(Incidentally, if you follow the link and read the article, there is no comparison between President Obama filling out a bracket and President Carter correcting the grammar on the memos he received. Brackets were Obama's version of poker, enjoyed by a politician or two.)
https://sites.middlebury.edu/presidentialpower/2011/03/18/tennis-anyone-march-madness-hits-the-white-house/