So, people can't be honest with their opinions? People can't dislike things, even if it's a natural instinct of theirs? They can't "Ruin" the show for themselves because people might yell at them for destroying the illusion of perfection?
And I don't see how criticism can genuinely "ruin" somebody's enjoyment, aside from somebody criticizing a movie or show while watching it with friends, or if they resorted to personal attacks, or if they pressure other people to agree. It sounds more like people are afraid of confronting their own doubts.