Just like swept wing. You are the Captain. Can you go to the Chief Pilot? If not, I would request a private meeting and discusss your observations with the boss. If you get fired, I know you can find a good lawyer and sue for wrongfull termination. I would document everything starting now.
Another question is are you going to let this unsafe pilot kill you. Review the B-52 crash. Remember that nobody would fly with, Bud, the pilot except the Commander who had no choice and knew he was unsafe. They are all dead now.
Spanky