Is there any tv show, then, whose fans aren't a minority?
No. There are no mythical "modern standards" that can turn ten percent of an audience into a majority.
If that's the case, then what does the fact that a show is "only" liked by a minority have to do with it being a failure or a success?
People here have named plenty of reasons why the show is a success (great ratings & dvd sales, several awards, good reviews, a phenomenal IMDb rating
), so the only standard by which you can call it a failure is your own personal taste. Why do you spend countless posts trying to convince everyone that it's a "failure", when all you're really saying is that you happen to not like it?