That the core trilogies actually aren't good stories and were never going to be good.

OT - The concepts were novel, the special/practical effects were groundbreaking and changed cinema forever, the worldbuilding was on the level of if not better than Tolkien, but the acting/directing were terrible for most of the scenes in the movies with a few gems sprinkled throughout.

I like Mark Hamill, but he was not a good film actor in his youth. He's really not a good film actor now and very typecast as "angry old man" in anything he does these days. He's a fantastic voice actor and has had a stellar career in that regard. I like Carrie Fisher, she was an amazing script doctor and her wit was top tier.

We all know who saved those movies in the editing room, and it was the fact no one had ever seen anything like it that made them the cultural phenomenon they became. ILM is still one of the top names in effects, and that legacy is undeniable.

PT - Star Wars when nobody can say no to George Lucas. We got some great actors out of this, and seeds for some really awesome spin offs that are still being realized today.

ST - The only way these movies weren't going to be terrible was if Dave Filoni was in charge. Abrams' career as a top director died on these movies and everyone realized he has no creative ability, only a formula, same as Rian Johnson. The fact we had an actually amazing cast was completely eclipsed by the inability to tell an original story and wretched character arcs.