I don’t think he appreciated the depth and power of the swamp. Being a business man he’d seen tons of mergers and acquisitions, the employees get new business cards and marching orders. Some bitch and moan but go along with the new boss. The swamp is much larger and powerful, and have more things in place to protect them. Also, being an outsider to DC his bench was very shallow as far as personnel was concerned and he ended up with enemies in positions near him.