After having just rewatched them all, episode 8 is IMO the only really bad one. It was filled with bad decisions, like those stupid bombers, making enforcing the hierarchical structure of the resistance a major plot point, going from “tracking light jumps is impossible” to “they can only track it from one ship!” like it made any sense at all, both sides of that “chase” failing to use any kind of tactical thinking (why didn’t the resistance fleet scatter if they knew they could only track from one ship? Why didn’t the first order have a few ships use light jumps to cut off the chase? If they could send shuttles this whole time, why not send some for fuel?), Luke deciding because he failed Ben that it’s better to just sit back and let his friends and everything they fought for die, Luke, who refused to fight Vader because he thought there was still good in him, considering killing Ben by turning on his lightsaber while he slept… It’s just a very badly written and produced movie.

Ep 7 wasn’t bad, and ep 9 had some flaws but overall wasn’t bad. They shouldn’t have switched directors (especially to one that seemed to hate what star wars was and wanted to “fix” it), should have had a plan from the start (or maybe even just used the plan Lucas already had for the sequels, though they would have had to use different actors since not much time had passed since RotJ).