Okay, to be honest, I fucking hated Spiderman 3 with a red hot fiery passion. I think that every single scene ruined that movie. But, in particular, it was every single scene that contained The Sandman:
Seriously, his character added nothing to the plot. Even as a sub-plot, it was shit. It's almost like they'd written the entire movie, then realised that they had a couple of million dollars in their CGI budget left over, so just wrote his character in to use up the rest of the budget.