I am with you, I have never understood why Jar Jar annoyed people but the Ewoks didn’t. Both were silly in the same way to me.
Maybe because Jar Jar was irredeemable as a concept, while the Ewoks could have worked. The main problem with the Ewoks was the visuals should have suggested there were about 50 times as many of them as there seemed to be in the movie as shot, the whole forest should have been moving, and there should have been mass casualties among them, even as their greater numbers managed to have the same effect in the battle.
No similar adjustment could have produced a fan version of Jar Jar that would have been worth including.
That's easy...
Jar Jar Binks acts, talks like a retarded Jamaican alien, Eworks are cute and fuzzie...
Ewoks didn’t talk.