They always go after people for “pretentiousness” and so does their audience.
But they aren’t being pretentious. Of course they believe in their own interpretations about a film, but they aren’t claiming that their opinions should matter to you. And remember that time they called other YouTube critics “pricks”? In the next episode they bring up how many people got mad at them and Rich blatantly says “I’m a prick.”
And to bring up the whole audience issue, I don’t think their fanbase has nearly as many blind followers as you seem to believe there are. People repeating jokes or generally agreeing is perfectly normal.