Wether or not you like a movie is entirely subjective, but the question if a movie is well made is not.
That’s closer to true, but still not really true. How you define “well made” is kinda subjective and a movie can quite easily be “well made” in some ways and not so much in others. Since we’re talking about ROTS, that movie is “well made” in terms of its visual effects (especially for its time), its action scenes, some parts of its story, etc. Not so well made when it comes to the dialogue and acting.