Chris isn't a normal person, if he was and he reacted to things in the way a normal person would then he wouldn't be the Chris chan we all know. Your point about his life being like the Truman show is pretty accurate but there are some pretty big differences. The producers of the Truman show provided Truman with a idyllic life, he had a loving wife, many friends, a nice home and a good job. The world he lived in was free of crime and everything was perfect. The producers of the Chris show have embarrassed and humiliated him, they have stole his money, mocked him and harassed him and finally they have agreed with every delusion and allowed him go further down the rabbit hole.
Every kindness and moment of genuine concern or advice given to Chris has been overshadowed by the massive piles of shit that others have thrown at him. I'm not trying to absolve Chris of his bad choices or remove the blame that his parents have for not getting him the help he need years ago but every troll has a hand to play in all of this even in some small part.
Truman won in the end, he got out of his perfect but ultimately false life to find realty. Chris hasn't got out out, in fact he's in deeper now than ever.
Dick is right for the wrong reasons. He just wants to discredit the site because it's harmed his self image. Add in the fact that Dick is a massive simp who's only goal in life is pussy and it's easy to see why he's taken this position, but he is right.