No he “got away” with decades of war crimes by becoming disillusioned of the society he was born and bred in and becoming a political enemy of the state and putting his physical wellbeing at risk to free the people his country had waged war on all while mentoring the person who would take over that country and try to create a better country and a better world. One of the most poignant moments is when he says he didn’t realize his visions of conquering ba sing se would be him taking it back for its own people.