I swear I'm reading some sort of sci-fi book here. This is weirder than I ever thought it'd get.
Even the people who have the most vested interest in Chris don't know how deep the rabbit hole goes.
His mind is unique in all senses of the term. Literally nobody else we can find has a brain that works quite like his does. It goes beyond simply "autism and poor parenting." He was raised to fear and distrust everyone, especially mental health professionals. He was coddled beyond belief, always told that nothing was his fault and people were just jealous and/or fearful of him and his disability. When he inevitably failed in the work environment (he held a part-time job at Wendy's for something like a month in 2001 before getting fired), his father responded by pulling some strings to get him placed on social security disability, ensuring that he wouldn't have to work as long as his parents were still alive.
He has little understanding of sex, gleaning most of it from a mixture of pornography and strict Christian upbringing. He has stereotypically feminine characteristics and has said before that he'd be willing to have sex with a man if it pleased his internet girlfriend, but becomes nearly violently angry when accused of homosexuality. He created the concept of Tomgirl, an impossibly bizarre transvestite-esque caricature, and not even his closest companions know why. Maybe Chris himself doesn't know. Some say it was because he was told to "embrace his feminine side" to get girls and he just took it way too far (someone I know who's more knowledgeable confirms this happened, but even he doesn't know why Chris interpreted it this way). Some say he has legitimate gender confusion, but many are skeptical as he continues to insist that he's a man who happens to be a Tomgirl. Some say he wanted to be the male equivalent of a tomboy. Some say it's a bizarre way of expressing his closeted homosexual desires. Nobody knows; his mind is too fractured to glean any information.
He has both severe gullibility and severe paranoia. Anyone he doesn't know is automatically a villain until they prove otherwise, and even their method of proof may be taken as evidence of wrongdoing. Even the police and courts are in the trolls' pocket, and he's retroactively accused people in his past of being trolls or even starting the whole conspiracy. At the same time, he mindlessly follows anyone he already trusts and will never believe that they would do him wrong. Though that behavior may change, as a troll recently posed as his cousin to get information.
He hates and fears authority, as people higher than him are the one check on his behavior. He would likely do a lot of nasty things if he didn't have to fear retribution, either from the establishment (like police and school officials) or from the many people stronger and smarter than him. He taunts the police and mall security and flaunts their rules, but panics and runs screaming (sometimes literally) as soon as they approach to punish him. At the same time, he has no problem trying to send said authority after those that he deems deserving of his wrath: many times he's attempted to threaten legal action against trolls or even people who just happened to annoy him. According to an incident where trolls crank called the local police station with a CWC soundboard, the police are fully aware of the Chandler family and may have had to deal with many false alarms or claims from them in the past.
He is both manipulative and manipulated, stubbornly determined and lazy beyond belief. He will get into an argument, have the upper hand or even have something he can legitimately hold over the other party's head, then drop out of the fight altogether because he can't bring himself to put forth the effort to press harder. When he's got his balls in the metaphorical vice and is over a barrel, he'll act like he's negotiating from the superior position. He lies and schemes his way around people, treating them more like video game NPCs that can give him what he wants instead of real human beings, but is so incompetent and unintelligent that they manipulate him back without him ever knowing (or he's so incompetent that his attempted manipulations merely backfire spectacularly). He is a walking contradiction.
He thinks the world owes him everything, while he owes it nothing but himself. He's perfectly content to sit around all day earning SSDI checks that he hardly deserves, without considering what life will be like when his mother dies and nobody is willing to care for him. When confronted with a problem, his first response is to either ignore it until it goes away or scream like a baby until someone fixes it for him.
His autism comes and goes as a disability or advantage as it pleases him. He will declare autistics to be the next step in human evolution and persecuted because of fear and hatred from inferior neurotypicals, and then immediately use "I'm retarded!" as an excuse when he gets caught doing something dumb.
The reason people have such a morbid fascination with Christian Weston Chandler is because he's a person like no other. Everything about him is a psychologist's dream case, though it would likely turn into a nightmare trying to actually get anything out of him: Chris fears mental health professionals and hates anyone who tries to fix him. He'll gladly lie through his teeth about anything and everything, especially things that may get him in trouble or scolded if he revealed them. One woman who tried to white knight him turned into a troll because it was "like talking to a brick wall." He is an unsalvageable mess, only good for study.