You know, when some people say that a movie, tv show or episode of good show is outright terrible, my first instinct is to go "It can't be that bad" and most of the time I'm right.
It's hyperbole; exaggeration. You don't get noticed if you just sort-of liked something or sort-of didn't. It's always either the worst thing in the world or the best.
Basically I have developed some rather lax standards. Whenever someone says something is terrible, it doesn't really seem that bad as I have seen a lot worse.