According to Osho, if a son keeps repeating the same path despite suffering—even in the face of death—you cannot reform him; take your hands off. Such a one may be beyond your correction; focus on transforming yourself instead. Attempts to force change only harden his ego and create a battle of wills. Your silent example may create a climate where genuine change happens naturally.
If he won’t learn even after getting hurt, you can’t fix him—stop pushing, improve yourself, and he may change by himself.