Luke starts off Return of the Jedi being all kinds of strong with the Force. The movie never actually explains how he got that good, only we know that he didn't do it by going back to finish his training with Yoda.

I'm sure this gap was explained in one of the many books out there, but just going along with the movies, you have to assume that he just figured shit out on his own.

I mean he didn't really fight with a light saber at all in A New Hope, yet after like two scenes of training with Yoda in Empire, he battles with Darth Vader, the most powerful Jedi ever. And yeah he got his ass kicked, but he held his own for a little while.

It's just crazy to me how there is sooo much to pick at with the OG trilogy, but somehow people gave it a pass, yet are crying up a storm over this new movie.