Is it possible GRRM not releasing the books because he is afraid the fans won't like it?

I've seen many people say that he gave almost complete instructions for the 8th season, such as for Arya killing the night king, bran becoming king, Jon going back... etc. Which tbh seems reasonable, but many of these details don't make too much sense in terms of how good of a story teller he is—like Jon going back to the wall even though there's no point anymore? The Arya one I don't mind as much as others have explained that Jon still makes sense as being chosen since he united the realm and at the end saved westeros from daenerys . And about daenerys FFS why can't there be a good Targaryan.