Just looking at photos in this thread, I can see a lot of Bear grottoes worse than Cincinnati. In fact, I can't really remember any Bear grottoes at Cincinnati other than the Polar Bears.
Assinoboine Park Zoo once had a pretty mediocre bear pit for grizzly bears, as well as black bears at certain points. It seems to have been absorbed into Journey to Churchill.
These are probably the worst I've seen (both at Bukittinggi Zoo in Sumatra). I'd hate to think what Cincinnati Zoo's are like if they are "100% the worst"!
Their were also grottos for Black Bears which are no longer their and Andean Bears which are still their.