Not necessarily "bad"....just bizarre.
I think for me....it's "Food Rocks".
Kitchen Kabaret was cute and wholly original.....but when they decided to spice things up by adding pop music, things took a turn for the bizarre*. The addition of pop music really put a timestamp on it, which, in the world of themed entertainment, might as well be a timed fuse.
Not only that, but there was the addition of characters who had this bizarre flat appearance instead of being fully three-dimensional figures, almost like they were plywood cut outs. Their animation was severely limited, leading to them just kind of waving their arms and moving their mouths live ventriloquist dummies.
And if that wasn't strange enough....these characters were made into caricatures of the performers they were parodying.
Which brings us to....Cher's face on a fish.
Singing into a spoon instead of a microphone.
*as is the case whenever pop music is added to original attractions. Looking at you, "Under New Management".