Actually, in Japan most workers or salary workers are like that. They really have not much time for themselves, leading to only almost living in their “work”. Some get obssessed because that’s how hard the pressure is. It’s like they woke up just to work nothing more. So the his character fits the most average worker in Japan. You can’t blame the character itself. (That’s why there are a lot of people who would passed on from overwork)

dropping this - MC's complete disregard to his health for work just doesn't sit right with me.