Off you fuck.
Jon's solo stuff is bad, but older Bon Jovi songs are awesome.
Also I would like to say that most if not all bands named in this thread are not THAT bad, but rather have some unpleasant or irritating quality to them.
For example U2 make decent music, but tend to be boring and Bono seems a giant douche (hello south park).
Nickelback are capable of creating good songs but 95% of their music is boring and all the goddamn same for 15 years and Chad has ramen for hair.
We need correct criteria to determine who is worst. I think it will be a band which somehow achieved huge commercial success while making horribad music.