RLM has contended that Star Warss dirty little secret is that nothing will ever work outside the original trilogy because that was the fairytale and its been completed..something along those lines.
Im believing that may be right more and more.
The PT may not have been good in the view of many people as far as execution goes, but it worked for me.
Now, the ST has struggled to find relevance because ROTJ was the fairy tale ending, for me after TLJ, at least. They had to undo that fairy tale ending to justify the ST. As it sits now with TLJ, I believe you are onto something, but I could change my mind on that, if Rise of Skywalker is good.