They need to go on the Dr. Phil show. He will have some pretty blunt advice for them. I seriously used to hate Dr. Phil, but after watching him a few times and asking my wife if what he was saying was BS, I have determined that he is actually pretty good at what he does. Or used to do. As a talk show host he pretty much just passes his guests off to someone else for the hard work. You are very right though. They need to stop acting like children and co parent the kid.