I have never heard of anyone calling it the worst in the original trilogy, that would have to be A New Hope. Not that any of the films are bad, but A New Hope was the slowest and most predictable, which is not bad. Still an amazing movie, and Empire is the greatest Star Wars film, and likely always will be. Jedi had some kinda ridiculous scenes, especially with the Ewoks, but that final space battle is one of the best to ever be in a movie.