A Rerun With A Continuity Gap

Rating: 3/10 (2 December 2018)

I am not the world's biggest Star Wars fan, but I have watched the old episode 6 (and the 2 before it). Star Wars: The Force Awakens is number 7, but in number 6 Leia, Luke and her resistance rebels were victorious. In this film they are again rebels and just have one base again and so forth. What is going on here?
The scenes are borrowed, but the acting is inferior also.
I am writing this and becoming confused. What happened?