Robert Jordan dragged out a series for commercial reasons and altered a major storyline when fans guessed it, leading to an uneven story, and then died before he could finish (due to his own slowing down of the series), leading to what most would consider was a lackluster (at best) ending.
Georgerr Martin can't seem to write anymore and let HBO finish his story for him in a slipshod and rushed fashion, poorly handling pacing and resolution for multiple story lines. He's also not in good health, doesn't seem interested in finishing the books at all and will likely die before finishing.
Which author let down his readers more?
ἡ δὲ κἀκ τριῶν τρυπημάτων ἐργαζομένη ἐνεκάλει τῇ φύσει, δυσφορουμένη, ὅτι δὴ μὴ καὶ τοὺς τιτθοὺς αὐτῇ εὐρύτερον ἢ νῦν εἰσι τρυπώη, ὅπως καὶ ἄλλην ἐνταῦθα μίξιν ἐπιτεχνᾶσθαι δυνατὴ εἴη. – Procopius
Ummaka qinnassa nīk!
*MySmiley*