The Chosen One thing is something is wish George never explicitly answered.
He said Anakin was the Chosen One, and if you only look at Lucas’s films that makes sense.
It’s more just a PT thing, I find. I guess it does work in all movies if killing the Emperor was all he needed to do, it could work. However, the OT never really says much about old Anakin beyond “good pilot,” “good friend,” and “good at being a warrior.” He’s decidedly not a chosen one there.
The concept may not appear in the OT, but it’s not a contradiction either. Obi-Wan once believed that Anakin was the Chosen One. By the time of the OT, he no longer believes that. Why would he mention that he once did?
If one views Luke or Rey as the extension of Anakin’s deeds, then he could still be a proper chosen one.
In what way is Rey an extension of Anakin’s deeds? For that matter how is Luke an extension of Anakin’s deeds, unless you mean the deed of f*cking Padme?
Also, nothing about the prophecy says that balance had to be permanent.
Is it even temporary? Anakin’s act of personal redemption changes very little as far as anyone else is concerned. Sidious is still alive. The Sith plan is still in motion. The de-Sidioused Empire is on its way out, but the First Order will take its place, and the Exegol fleet will be ready by the time the First Order falls. In the big picture, what has Anakin actually accomplished?