they made something massively impressive. As is obvious from the sheer amount of butthurt over the last couple of seasons. If they hadn't done such a good job with it, no-one would care. It doesn't make sense to ignore that.
It's a story as old as cinema. Wachowski's made Matrix by arguably propping themselves extensively on quite a few ghost writers remixing fanzine conspiracy memes (today's equivalent would be Mandela Effect youtube channels and such) but when they had to come up with plot themselves the sequels massively sucked. Star Wars worked as long as Lucas could riff ideas off Gary Kurtz, since the moment their collaboration ended Lucas hasn't managed to flesh out a single coherent page of ideas for the rest of his career. D&D created masterful adaptation of very average books, but the moment R.R stopped feeding them ideas, for all the millions they were paid, they couldn't do a justice to even a single plot line and literally torched their entire legacy (and let's hope careers) across 7 hours. The show deserved better, we deserved better, they were paid like no one else in history of television to be better and they still forked it up royally. For all the hours I spent on this series, I wish them all the worst, I hope they end up writing dialogs for dendrophile porn productions for the rest of their natural miserable washed up lives, the two donkey holes.