I don’t mind the existence of Ewoks, I really don’t even mind much that their victory is somewhat implausible. I understand why someone wouldn’t like them, but I never minded them. The problem is that too much focus is on them, and the scenes on Endor are interspersed between much better scenes (Space Battle, Final Duel). The scenes don’t flow well into one another. If the Endor scenes were more brief, and they found a way to include them without jarring tonal shifts, it would be right up there with SW(ANH) and ESB.