I haven't really had a BOURBON I didn't like. Sure, some were better than others, but I didn't find any to be downright offensive.
Now there was a blended whiskey called Corby's-- I think it was a Barton product-- that re-defined the word "rot-gut" for me. Like Jason Vorhees, even drowning it (in cola, in this particular case) couldn't kill the nastiness.
It's weird how the same distilleries can make products that are flat-out awesome (Very Old Barton and Ridgemont Reserve come to mind), can also make something that grotesque.