You do realize that there are plenty of people with psychological disorders (schizophrenia, sociopathy, etc.) out there that have jobs, homes, mortgages, even families, right? Hell, there are even serial killers out in society who live fuller, richer, productive, and even more functional lives than Chris. I'm not saying Chris is a serial killer, but he definitely isn't sane. Before deinstitutionalization started gaining traction in the 70's, someone like Chris would have been placed in a big hospital somewhere away from society. His delusional belief that fictional characters, especially fucking cartoon characters, exist in some universe paralle to our own and that they can be psychically communicated with is not healthy. You can't even blame his Autism on that because there are plenty of Autistic people who don't believe such fantastical and childish things. It sounds more like a schizo disorder. Granted, we can't know for certain unless a psychologist conducted a full mental health examination on him, but it's pretty clear that Chris is a couple McNuggets shy of an Extra Value Meal.