That’s more or less my take too. The world of the Star Wars universe feels huge and expansive, but in reality by the end of the original trilogy they had basically told all the interesting stories that were to be had about it. And even then, they were starting to run out of material for Return of the Jedi. They tried with the prequels, but as you say it mostly fell flat and ended up boring. The sequels started off more or less rehashing the original trilogy so they were at least entertaining, but that wasn’t enough for three movies and it turned into an absolute mess by the end.
That’s more or less my take too. The world of the Star Wars universe feels huge and expansive, but in reality by the end of the original trilogy they had basically told all the interesting stories that were to be had about it. And even then, they were starting to run out of material for Return of the Jedi. They tried with the prequels, but as you say it mostly fell flat and ended up boring. The sequels started off more or less rehashing the original trilogy so they were at least entertaining, but that wasn’t enough for three movies and it turned into an absolute mess by the end.