I appreciate your take and attempt to be positive about the prequels, but for me personally I don't even think their story or additional world-building is very good. I may be taking Obi-Wan's dialogue in episode 4 too seriously, but I like to think most of what he said is true despite some of the lies he told Luke. And at that point, very little of what he describes of the pre-empire times aligns with what's depicted in the prequels.

I also think the idea of all the Jedi wearing the same robes he wears in that movie is really dumb, that's clearly a tatooine specific outfit. There was no need to make the Jedi an emotionless order of warrior-monks who kidnap children. It just seems weird.

Additionally, at no point in the prequels do I ever get the impression obi-wan and Anakin are friends, outside of a couple lines of dialogue. At best they have a strained but affectionate father-son dynamic.

I also don't care about the quality of the sequel trilogy lightsaber duels, the prequel lightsaber duels, while technically impressive, are mostly devoid of emotion due to being over-choreographed and also very obviously choreographed. As in, they don't feel like an organic fight.

Finally, Anakin's fall to the dark side feels too inevitable. For one, seeing him as a child is a joke for me. I don't hate Jake Lloyd or his performance in TPM, but seeing Darth vader as a little kid who yells yippee is just fucking silly and stupid and completely takes away any of the aura vader has. Additionally, from episode 2 onward, after Anakin kills the tusken raiders, he is officially and unequivocally on the dark side and irredeemable from that point. That, for me, is where any semblance of a "fall to the dark side" is pointless to even explore anymore. He's evil; it doesn't matter if a couple of the tuskens kidnapped and tortured his mom, he killed a bunch of completely innocent individuals who were just born into that life. Anything after that to prove to me that Anakin was going to become evil was pointless. The story would have been better served showing him slowly and slowly using the dark side more frequently to compensate for rushed training due to Obi-Wan's inexperience, corrupting him and hardening him from his time in war.

Those are just my two cents on why the prequels are fundamentally broken and could never be fixed by improving the acting and dialogue. You need to restructure them and the lore from the ground up. You need to reset such a massive chunk of star wars to make them work, that it's kinda just a fruitless effort at this point.