Trump was an expert in commercial real estate, not government and politics.
He was probably told civil service can’t be fired by some doof that believes that’s somehow a fourth branch of government.
The prez can’t fire people arbitrarily though, like he can with appointees who serve “at the pleasure of the prez”.
He can fire employees with cause, such as for insubordination.
Something the swamp creatures don’t want you to know, and I’m sure no one mentioned that to Trump.
What can you do when China Mitch hands you a list and says, if you don’t pick one of these people, they will be DOA in the Senate?