Funny how many people think Starcraft 2 isn't even better than Starcraft 1, especially when you add in Brood War.

The game's campaign being what it was made it so people never warmed up to it, the big hero-focused storylines and then mishandling of said characters (Kerrigan's abortive humanization and then rushed redemption, the Protoss being framed in entirely the wrong tone, the half baked epilogue) just made it so that the campaign didn't stick as Brod War's did, even if the gameplay was superior.