The worst stable, IMO, was one that was so bad that I can't even remember what they were called.
They were a bunch of militant white guys sometime in the mid-nineties, think Nation of Domination except white. I don't think they lasted 2 months. All I remember is them entering the scene, beating up some scrubs, cutting some really boring promos, and then, without anyone noticing, disappearing into the abyss.
That's all I remember of them. Other abortions like the X-Factor or the Union I can at least name one member.
"AAAAH! It's not hot!!" - Hulk Hogan