I don’t if most would consider it bad (as opposed to just not good), but I love Revenge of the Sith.
I’m also of the opinion that the Harry Potter films got worse as they went on, with the Columbus films being fantastic while the Yates films are barely watchable.
I enjoy all three Jurassic Park films, but hated Jurassic World.
I genuinely don’t see anything wrong with Kingdom of the Crystal Skull. Seriously, what is it about this film that people don’t like?
And since someone mentioned a TV episode, I was watching the Doctor Who story The Celestial Toymaker recently, and thought it was much better than people give it credit for. It may not be the masterpiece people expected when it was missing, but it’s still pretty good.
There’s only one episode of TCT in existence so it’s hard to judge that story as a whole.
I was a bit bored by The Enemy of The World until they found all the missing episodes. Now it’s one of my favorites of the era.