That's akin to asking what is the worst song ever and, as has been stated before on other threads, there are so many truly awful "bands" out there the list would be endless.
It's also purely subjective and down to personal taste, I'm sure there are plenty of people who would disagree with your own choices.
I'm not one of them I hasten to add.

Of the options given in the poll I would have to go with Twisted Sister, as all the others have at least some modicum of talent.