I think that the people who critique RotJ for Ewoks just have latent teddy-bear issues or something, and that their gripes say something about only them, and not the movie.
It says that we understand there’s no way a bunch of Ewoks should be able to take down an entire Legion of the Emperor’s best troops.
… who wear full body armour that does nothing to protect the wearer, and only makes it difficult for the wearer to see, and walk.
Though maybe their visors server as excellent sunglasses, not that there is excessive sunlight under the tree canopy on Endor.