Feuds are obviously an integral part of wrestling. How many of us would have bothered to watch SummerSlam had it not been for The Undertaker versus Brock Lesnar? That wasn't a main event that happened just for the sake of it. No, those two men had a history together and had business to take care of in the squared circle. Undertaker costing Brock the WWE Title and their heated pull-apart brawl added to a feud which had already been established fifteen months prior at WrestleMania. It was a feud between two stars that (for the most part) has not disappointment and the results speak for themselves. Other WWE superstars have not been so lucky as to have the kind of feud that Brock and 'Taker have. They themselves had a mildly disappointing feud in the early 2000s, where Undertaker famously refused to do the job for the rookie. They weren't the only two wrestlers who had disappointing feuds that decade, with many notable stars engaging in disputes that failed to capture the public's imagination. Was it the fault of the wrestlers? Did the booking suck? Or was the timing just wrong? Whatever the problem was, the following ten feuds from the 2000s have to be branded as major disappointments.