I knew something was wrong when Lady Stoneheart didn't appear at the end of Season 4. It would have been the perfect scene, ending the season, to show Beric Dondarrion's men pulling the lifeless Catelyn Stark out of the Trident and then Beric resurrecting her, as the camera zooms in on her not as full of life eyes--plotting revenge against anyone even remotely tied to wronging her and her family.
For the most part, 5 & 6 were fine. A Feast for Crows and A Dance with Dragons material was eventually exhausted and new stuff had to be created.
Season 7 was rushed, the timeline was atrocious, characters teleporting all over the place--some in the SAME episodes. Tyrion out of character in Seasons 7 and 8 took many of us out of the show early. Only 7 episodes, lame.
Season 8 destroyed rewatchability of the show, Episode 3 was so dark you couldn't see anything and then to top it all off, the camera kept cutting the moment one of our favorite characters were in trouble. Euron Greyjoy by far the worst character in the show. Tyrion being stupid again and out of character. The final episode--brutal. All that hard work and the payoff for what? Nothing.
Also, why the heck would you change the design and layout of the opening theme of the show showing the map of Westeros and all the locations visited before each episode. Keep it consistent with the other seasons.
Bah, the pain just doesn't go away. I need George to finish his books and see if any of that crap was his idea or not.