Not the song, so much, as the band.  At some point, Billy Corgan started to take himself just a little too seriously and it just killed any goodwill I had towards the Smashing Pumpkins and their previous output.  It started with his rants against pop music when kids decided they would rather listen to Britney Spears than whatever crap album he had out at the time, continued to his inserting himself into the final episode of The Bozo Show, and culminated with his singing of the 7th inning stretch at game 7 of the 2003 NLCS, saying that even if the Cubs lost the game, everyone would still love them.