I read quite a bit of it, too.
I think the main reason people did not pick up on the severity of the situation is that he has been in treatment so often and for so long that him having trouble had already been normal. It was just Elliot being Elliot. His extraordinary blindness for how the world works is also very interesting. Reading this, I see all the evidence of what goes wrong right in front of him, but he just cannot see it. Reminds me a bit of our little FireShield.
As for types, which are, of course, the whole purpose of this thread: ISTJ, 3w2.