For me the biggest issue is Thrones is a show that has always excelled at character development and world building, partially because that is what the books (for better and worse) focus on, with some grand spectical used fairly sparsely throughout a season, coupled with for the first few seasons you didn't know which characters where going to live and die so there was some genuine tension to the show.
For me, beginning with season 6 and getting progressively worse, it's gone from character development to character types (ie good and evil, loyal and deciver etc) and too many fan favourite character have plot armour or just keep coming back because we like them (Bron I'm looking at you). It's also shifted to too much grand spectical that comes at the expense of good story telling, sure it's exciting at the time, but it rings a bit hallow.
That all being said, I've still really enjoyed it and it was satisfying seeing big events in this season that have been hinted at for years now. For me the last episode was the worst of the season and perhaps the worst episode of GoT, I'm not angry about it but a bit disappointed. It just wasn't very interesting, and didn't really sit well with the basic principles of how the show has worked throughout its entire run.
For a show that had me literally on the edge of my seat shouting at the TV, it's a shame to see it go out with a whimper.