In my opinion, ROTJ is the best from OT. It has it's flaws, but none of the SW films is perfect (not that any film is perfect, but AHN and ESB are also far from being perfect). When I was reading those "10 reasons why ROTJ suck", I was thinking that the author didn't understand a few points. He said that there is nothing redeemable in Darth Vader. Well, that's exactly the major point of all this! Even Obi-Wan and Yoda didn't think he was. Not even Palpatine. Everyone thought that his was just evil guy, a machine. Just watch the movie, watch their conversation on the bridge on Endor).

This was perfectly clear to me as a young boy (the prequels didn't exist at that moment) and I can't understand, why it isn't clear for the author.

If I had more time, I would write more. Besides Ewoks and second Death Star, in my opinion there is nothing wrong with ROTJ. It still entertain me more than ESB and AHN. They are great movies, but they also have unnecessary subplots and boring moments (I almost fell asleep during battle of Yavin or on Cloud City, before Vader shows up.)