Spoilers - Was it worth it?
Michael lost his mom and brother largely b/c he refused to accept being burned and wanted to clear his name and get back in the CIA. He cleared his name, but the CIA still disliked him, he never quite got back in, and he lost his family in the process. He was also betrayed by his mentor, whom he had looked to as a father figure.
Was it worth it? Should he have just accepted being burned, taken the security guard job he was offered early on or just kept doing his 'helping people job,' and stopped pushing the envelope? Carla accepted it, Victor accepted it (for a while). Why not Michael?
He had Fiona and Charlie in the end, but lost his mother, brother, and two good friends (assuming he didn't see Sam and Jesse again), and everyone thinks he's dead.