These are bands that were once good but have since jumped the musical shark...so please don't add bands like Nickelback that have always been a joke...
http://www.ranker.com/list/bands-that-have-turned-into-a-joke-/aargh,
Aerosmith
Guns N' Roses
Korn
Metallica
Stone Temple Pilots
This new version with Chester suck suck sucks...
Ted Nugent
Use to be a band...now a pants crapping joke...
The Rolling Stones
U2
Gradually getting worse for the last two decades...now officially a joke...