He really needs help from a professional, if he has a weak motivation and heart he would have lost his mind just thinking all his lost, a professional help will allow him to set up activities and guidelines together with his family on how to overcome those losses it's actually
a mindset.
If he wants to go to a professional, then I think his problem will be solved, and he can realize that what his doing is not right so he can start to fix his life to be better. But that will depend on him because not all people will realize and want to visit a professional to solve the problem and mostly, people will don't care about that. People will still play gambling without thinking about their life and the family, and that will only make their life will ruin soon or later. He needs to aware of that and tries to stay away from gambling for the first thing that he needs to do now. And he can start to build some activities or think about the other passion that he might have.