Honestly, the Napster barely even rates as a reason I hate Metalica. The main problem is that they are money worshiping a$$holes and completely unaplogetic about it. They covered Bob Seger and made something *less* intense in the process (this should be impossible). They squandered their position as the future of metal and turned into the poster children for the worst aspects of it, taking down the entire genre in the process. They endorse using their music as a means of torturing POWs, they helped ruin American rock radio completely, f*ck those guys.
Their main purpose in the word is to serve as filler for NuRock stations who's only listeners are people who, apparently, hate music. In other words, they have no purpose.
Meanwhile, many real metal bands carry on, completely unbeknownst to those that would rather hear Metallica's shitty dirge interspersed with ads for used car lots and discount furniture.