So, like
A great movie fight will have both good fight choreography that makes for a visually engaging fight that shows the skill (or lack of skill) held by the fighters without overwhelming the audience and also tells a story through said action. The centerpiece lightsaber duels in ESB, RotJ, and TFA are really great about this. All three are well choreographed fights (with ESB and RotJ being especially good for their fight choreography because they were handled by Bob Anderson, the GOAT of hollywood swordfighting) that also communicate very clear stories through the actions of the characters, with little need for you to have to have commentary telling you what's going on. TFA, despite not being as "good" of a fight as the other two is a masterclass in showing a fight between somebody who is horrifyingly out of their element versus somebody who is wounded and emotionally distracted, leading to a well choreographed fight that is intentionally sloppy in a way that communicates so much to you without it ever being needed to be told to you.
A good movie fight will at least do one of those things. I will absolutely cop to the fact that the one duel in ANH (Vader vs Obi Wan) isn't a visually interesting fight due to the limitations they were dealing with when filming the scene. It absolutely makes up for it in how the fight still manages to communicate a very effective story, even if the fight itself is really weak. The Throne Room fight in TLJ is the opposite of this where it's a well choreographed fight that doesn't really do a lot to communicate an effective story.
A bad movie fight will do none of these things. Virtually none of the prequel fights do a good job with these elements. Far too often, the lightsaber fights, which the prequels lean far too heavily into to the point that they stop being special, just end up being little more than special effect dance videos, with poor fight choreography that elevates flashiness over the actual fighting set to gaudy music, and where characters have to frequently update you on how the fight is going because the fights themselves seldom tell stories on their own. The Anakin vs Obi Wan fight in RotS, which should have been the money shot for the entire prequel trilogy, ends up being a bloated video game cutscene that would be better at home in a Platinum produced Star Wars character action game (for the record, I would 100% buy the shit out of that game and love every second of it).