In every position of power you'd be called a fool to not rely on the people around you who you appoint and trust to handle their shit. Trump learned this in the private sector, you have to do your best to determine the most loyal capable option and then just let them do their job.

Both Trump and Pence can't be everywhere at once it's simply not possible you have to trust your people. Ultimately yes many of their appointments failed but they had no other option, it's not their fault that snakes and lobbyists are seducing every single staffer with bribes or threats as soon as they are even indirectly connected to Trump.

This isn't the Mafia you can't just have a blood oath and murder anyone disloyal, if someone is disloyal the best they can do is fire them after the damage is already done. If we were a dictatorship of course they could murder or lockup anyone who flips, but that's literally the only way to avoid deep staters you'd have to go full authoritarian and that's not the country we live in. Unfortunately these staffers have freedom to turn on our President and there's not much you can do after the fact. I do think many were loyal initially then the deep state compromises them and they're fucked.