You are correct when you say overrated =/= bad. Obviously people have chosen to challenge your examples but that's not really the point. However, I believe people want to hate something overrated, not because it's inherently horrible, but because the rabid fans bring up these emotions. Let me bring up Twilight to explain what I mean. (To everyone below me: Please don't start talking about the book in this thread) The Twilight series is obviously not a shining example of well written literature, but in all honesty it doesn't deserve all the bile it gets on it's own. What really annoys people is the amount of fanatics who's emotions do not correspond with the actual quality with the book. People are usually put off by fanaticism and this can easily carry over to the actual object being "worshiped".
To give a more personal example, I had a friend who was completely obsessed with one band. He would constantly praise them and blast their music. I didn't think much of them but over time I began to dislike them more and more. The reason? How they were presented to me. In all honesty I would never be critical of the band if I had just heard them on the radio one day; I might have even liked them.
Anyway, that's my long winded/psychoanalytical rant on this topic.
To give a more personal example, I had a friend who was completely obsessed with one band. He would constantly praise them and blast their music. I didn't think much of them but over time I began to dislike them more and more. The reason? How they were presented to me. In all honesty I would never be critical of the band if I had just heard them on the radio one day; I might have even liked them.
Anyway, that's my long winded/psychoanalytical rant on this topic.