I don't understand

Rating: 3/10 (14 December 2009)

This movie has, possibly, the worst script I've ever come across in a film.
So, we meet Luke. He lives with his aunt and uncle in some sort of extraterrestrial farming. The get killed, we never hear from them again. A passing shot is it. Luke never even recalls them once.
He meets a strange man, this man he has been told is crazy and possibly senile. The man tells him about a mystical "force" that lives in everything and without any demonstration of it, or the man's sanity, Luke declares he wants to leave everything behind and follow this man and learn about the force. What?! We meet Darth, a man portrayed to be villainous by the mere fact we're told he's supposed to be and that he dresses in all black and wears a cape. The story never builds on him at all, and I was left wondering why I should I even care about him.
The characters are all shockingly two dimensional, with little to no back story and nothing else ever added to them.
The only thing that salvaged my viewing of this was the relationship between C3PO and R2D2.