I don’t there’s much for choices. During 8 years of fundamental transformation, Obama evidently cleaned house.
Meanwhile Trump still has unfilled positions because he went from the Russia bs to impeachment. You can blame repubs for that to some extent. McConnell said no, you can’t get anyone through right now. Repubs were around while Obama was prez and they didn’t do squat.
I seem to recall that Obama canned many senior military officers and replaced them with people who bought into his BS.