Screen adaptations better than the written word: Stand by Me (The Body), The Shawshank Redemption (Rita Hayworth and the Shawshank Redemption) and Stardust.... and maybe The Green Mile and One Flew Over the Cuckoo's Nest.
It's a very low bar, but each and every James Bond film has to be better than the book. Which leads into Martin's comment on anti-fans who would rather discuss things they hate rather than things they love.
Most of the time, I feel like I stand completely alone in disliking The Lord of the Rings movies. Fellowship: A+. Towers: F-. Return: D. That being said, the visuals of Rohan are stunning.... and Sam's fight with Shelob and the Charge of the Rohirrim are two of the best things I've ever seen. But what would Tolkien have thought? After twenty-four years he might not have gotten any further than arguing the details of Bilbo's party or he might love the scene at the Grey Havens.
And yet, when an artist signs over authority to someone to reproduce a work there is an inherent danger of the artist not liking the end product. Prince wrote Nothing Compares 2 U and reportedly hated Sinnead O'Connor's version. And no matter how many times Prince performed it, hers is the definiitive version. While on the other hand, Bob Dylan admits that Jimi Hendrix' cover of All Along the Watchtower is the definitive version. I dunno what Dolly Parton thinks of Whitney Houston's And I Will Always Love You, but Houston's version is the one most people know.
As far as I know, neither Prince, Dylan, nor Parton signed over permission to remake their works.... they just had to live with the results. Martin got paid up front for signing over his works and then complains. It does not leave a good taste in my mouth. If he had an end to his story, then people might understand his intent better.
I think that GRRM will end up refuting all the supernatural in ASOIAF's religions and prophecies. But I think he will make the World Wide Weirwood Web a positive corrective institution for the salvation of humanity. In his mind (I think), the hivemind is the ultimate way to know and to be known. I think this is a fundamental aspect of GRRM's beliefs. He wants a supernatural/celestial union without a god. His characters all reflect the desires to know others aand to be known in return.... and I think that by not accepting the hivemind of the Weirwood trees, Jaime will not find redemption, Cersei will not find peace, and Tyrion will never be loved.
Back to my first comments, Stephen King and Neil Gaiman write smaller stories that adapt better to the screen. Martin has written short stories, novellas, and novels as well... but they've not caught the attention of the mass market. He just needed to write faster so that we could judge the work and his intentions fully. I feel too many people assume, that by using certain tropes, Martin will fulfill the ending they expect. I know that I used to do that. There is no way Dany, Jon, Arya, and Tyrion all survive. At least two of them will go with Cersei, Jaime, Brienne, Melisandre, Barristan, and all the Greyjoys to join Eddard, Robb, Catelyn, and all the other murdered people.