This is kinda deep.
In the sense that... When you've been in a bad place, let's say jail. And you get out and get your freedom back, that same freedom becomes a rope on you, you come from suffering, from pain and degeneracy inside. Almost nothing good comes out of that environment... But you miss it. You got so used to that negative lifestyle that becomes confortable. And when you get a chance, like the 180 the MC had, It becomes overwhelming. Too much, too soon. Is not like the yearning of his freedom was fake, but just as life takes BAD turns in a second it does for good too. But, change, if sudden, can fuck you up real bad, even if the change is for the better. He was so deep on his shitty life he can't fit with normal people, there's where I wanted to go with the jail alegory.
This is taken to the absolute extreme, of course. But I've felt a hint of what he's talking about. I wonder how the author will pull him out of that state of self-imprisonment, someone will die? someone will be hurt badly because they were to save him? Is he going to die? So many questions, only so much author can do.