Since I always hated the Ewoks, Yub Nub drives me insane. Yet, the new song and victory celebrations around the poorly done CGI-looking galaxy were bad too, plus make no sense when watching ROTJ without having seen the prequels.
I made a fan edit that removes all the Ewoks, and replaces the ending song with another Star Wars track that is fittingly moving. I also removed the silly force ghost “happy ending” and replaced it with the final image of Luke burning Darth on the funeral pyre.
Star Wars was never meant to be cute, but George wanted to sell more merchandise.