When Obito's eye overlapped with Kakashi's with the same design and he mentioned that bridge thing it wasn't even a reveal anymore
I'd say Hody Faggot and Sabo were pretty bad. Don Krieg too since him being unable to enter the Grand Line became almost too funny when even Bellamy got to Skypiea just fine
I guess I'd say Rebecca was pretty bad, she just kinda felt like a rehash of Shirahoshi, but less interesting.
Other than her I can't think of anyone who's that bad of a character.