I've made the "Anakin had no free will" argument before, and honestly, I don't really believe in it: it's just a fun route to go down.
I think the argument that the Skywalker Saga was about Anakin only works in a vacuum. As the name suggests, it's about all Skywalkers, not just one of them. Anakin had the greatest shadow, but the OT was about Luke was it not? Anakin was a major force in the galaxy, but he wasn't the only one. Not by a mile.
If you look at them through the lens of storytelling, through the themes they share, it's a remarkably cohesive story, much more so than the Marvel giant.
The Skywalker Saga is about love, it's about redemption, it's about temptation and attachment, it's about a grand story with small characters, it's about lightsaber fights highlighted by tragedy.
We're the sequels perfect? Absolutely not, but nothing is - you can't dismiss something as being unneeded because it doesn't fit your limited idea of what the saga should have been.
I heavily disagree with your idea that Palpatine coming back invalidated Anakin's sacrifice, because you miss why the sacrifice happened. Saving the galaxy was the side-effect, saving Luke was the real intention. What Luke did with his life later down the line is not Anakin's problem. Palpatine coming back didn't invalidate the sacrifice, it only reinforces it. It doesn't matter that Palpatine returned, because killing Palpatine was never the goal, it was, and always has been about saving someone dear.
The First Order is actually brilliant when you think about it: they were written as a deliberate caricature of the Empire. They adopt the aesthetic but not the chilling cruelty behind it, they're comical because they don't understand the Empire - and they're dangerous because they don't. Someone who understands the Empire wouldn't have taken the risks the FO had. Ben was the perfect Mascot, He was a caricature of Vader with none of the personality.
This is more of a procedural complaint, but I don't think you should have changed the title. It feels disingenuous to go back on a title, it feels like you're retreating from backlash, it doesn't feel right. This is elitist, but calling it an "Anakin's story analysis" oversells it. It's one point you bring up, a valid one no doubt, but it's still only one point. I've been guilty of the same before, but I think I've gotten better, I try to bring up new arguments as much as I can, and I'd suggest keeping with that trend. Why not come back to the argument in the future, but flesh your points out more