There were hints of the show going to shit in Season 5. Season 5 still had some brilliant shit in it though. Jonathan Pryce was absolutely brilliant as the High Sparrow. Season 6 started shameless fan service, and while I enjoyed some of that, it became just fucking silly in the last two seasons. The show runners became more exposed as hacks who couldn't close the deal without Martin's material. Seasons 7 and 8 were the biggest piles of shit I've ever suffered through. They ruined Game of Thrones worse than what Disney did to Star Wars.