You are crazy. Literally insane. SSBB is an incredible game. freaking awesome. Who in their right mind would judge it based on the Subspace Emissary? That's a minor sidebar to the real game, which is absolutely incredible. If you think it's disappointing, then your expectations were way off, not the game itself. I love it, and even my girlfriend who hates videogames loves it. She actually wants to play it with me all the time, and that is UNHEARD OF.
If all you care about is first person shooters and blowing people away with gory realism, then open your mind a little and appreciate that old thing called FUN, which is practically overflowing in SSBB.