On the contrary, they deserved to be ridiculed; they had made such a bad final season, or even the last two seasons.
There was a lot that wasn't under their control. Martin had only given them the basics of the end of the story. Actors (and maybe HBO?) were tired and wanted to move on forcing the plot to be crammed into few episodes. And they didn't have Martin's actual dialogue and written pages to base the screenplay on.
The pacing was completely off in those last two seasons and some of the dialogue was pretty bad, I agree, but Martin's plot elements and planned resolution were still there and I'm glad to have an ending to the story that we may never actually see on the written page, at least completed by the man himself.