Lots of opinions here. for ever hater there is someone who loves the band. I remember when it was so stylish to trash nickelback that people who had never heard them were reposting how bad they were. Not that I loved them but there was one Valentino Rossi video done to Nickelback that was legendary.
Definitely some great bands being listed here as "worst band ever", probably from a different decade than the poster grew up in.
Jerry