It also says that Tyler was sent to a “lunatic system” for treatment.

That's how the book ended. It's been a few years , so forgive me if I misremember: The main character talks about being in (not actually) Heaven where the doctors Old Testament angels have psychology diplomas on the wall and ask him how he's feeling.

The last line of the book is a janitor promising that there's a plan to break him out.

I was disappointed too, for the same reason.

Sadly it seems the rumors that the movie studio made a special version for the chinese streaming market were nonsense :(

At least do some atrociously horrendous dubbing, am I rite? What a missed opportunity.