Batman’s life sucks.
It does. He has nearly unlimited wealth and freedom as Bruce Wayne and he can never enjoy it. It’s nearly impossible for him to form meaningful relationships without the fear or pain of having that person murdered as a result of their involvement with him. His days are filled with rigorous training and his nights with battles that often come very close to being fatal. He’s eternally haunted by the memory of his parents and I don’t know when he gets any sleep.
So how does he put himself through all that hell? He has serious willpower.