Ori, I can't put my thumb on it, but as much as I loved S1 through S6, these last two seasons have been largely disappointing to me.
To put it in context, had S1 and S2 been the same caliber as S7 and (especially) S8, I probably would not have made it through them. There's just something amiss, I don't know if it's the story itself or the writing, but it's definitely not what it once was.
Prior to S7, I thought GoT was the best show of all-time.
I understand what you are saying. And as I just said in a response to another poster, there is definitely a change going on from what the shows/books were in prior periods until now. There is not as much cunning back-stabbing, and we now come to all-out battles instead of intrigue.
I certainly think that PART of the equation is Martin, but it's not that the writers of the TV show have no guidance, he has confirmed to them where the story was going all along. And if you want total honesty on what might be going on with Martin, go back and watch the PBS Finding Your Roots episode with Martin, where a lot of what he believed his family background to be was proved to be something else. I think his own personal life hints at how he is struggling to wrap up this massive undertaking.
But I think that the more reasonable overall explanation is that there are some expectation differentials (among the fan base) and some practical issues with wrapping up the show. We could debate number of episodes, though the actual minute-length of most episodes puts us a bit closer to what the "normal" season is like. I definitely think that the earlier seasons were an exercise in how to "tighten" Martin's massive books, while they have very little roadmap (outside of big reveals like Jon's parentage) to guide them now. But you still have the thematic issues, and if Martin's ultimate goal is to show how the outcomes need to CHANGE the prior historical patterns, so be it.
You can see this in things such as the entire decimation of certain ancient Houses; the ending of male-domination in certain roles, such as Brienne becoming a knight, Arya becoming an assassin, Cersei (and perhaps Dany) ruling even when a man may have the superior claim; the ending of slavery in Essos; a focus on characters choosing to be together for love, rather than arranged marriage (sometimes with bad outcomes, of course).
I could cite a lot of other examples, but I think that Martin has been shooting for something a bit different than Lord of the Rings. At the end of Tolken's story, many of the characters return to the same kind of life. Evil has been vanquished, but there were not as many societal changes. I think that Martin is trying to tell a story, and also look toward a future that is not as medieval as it was at the beginning of his story.
So many GoT "fans" are so desperate to see one character "win the Game of Thrones", that they are going to be disappointed to see that it wasn't in the plans of Martin/Weiss/Benioff from the beginning.
For the record, I'm not dismissing your gut instincts on Seasons 7/8. I get it. It's definitely different. But I will say that I liked Season 7 a lot more when I watched all episodes back-to-back. Having a week between episodes gives us all the chance to second-guess everything, particularly as the series comes to an end.
I'd just like to see everyone watch it to the end, and THEN debate it, rather than pick it apart on a weekly basis.
Thematically, the show is changing, and I think that the books will as well.