I once had a good customer who changed management. Soon after, they started giving all their business to my competition. I pulled up to their place of business one day and the new guy boss was trying to figure out how to hook up a trailer hitch to a truck ball. No kidding! He could not figure it out! I talked to him for a bit and just left him there to figure it out. Soon after he was fired and my business returned as normal. Sometimes you just got to let them hang themselves.