Probably. Most comics are self-aware and miserable, it’s part of why they’re successful.
Since Jim is neither a “comic” nor successful, he still has to rely on little quirks to make him feel different and superior (If you have to tell Colin Quinn, verbatim, that “I have little quirks!”, you’re a WRITHING faggot)
However, since this is merely an attempt to be different and unique, and since he has no redeeming quality in the profession he’s dedicated his life to, he likely has the occasional 40-yard stare when he’s looking up at his bedroom ceiling covered in cum, piss, and shit (Which he’ll profess he LOVES).
Jim is where he is because he is terrible at what he does. Any comic who was halfway decent at their job would not have squandered the promotion that a national radio show gave them, promotion that is the whole reason Jim has the modicum of success that he has now. Considering he hasn’t filled seats to the degree he did in the late 2000s and early 2010s, I think he knows this as well.
Put both of these things together and you have Jim Norton’s daily mental anguish.
Oh, and he drinks piss.