Worst by far. The ending is a forgone conclusion, every plot thread must be tied off and is done so in a manner of: “its the last one just get it done”. The film to me has always been a boring and uninvolving experience that is far too long.
At least AOTC has some showmanship, some different things going on and an actual mystery of sorts.
A good writer could convey everything in ROTS in less than a reel of screen time.
That said the novelization obliterates the film with great character insight.