Well, that happened.
That’s it, basically. The finale wasn’t wretched, it wasn’t good, it just was. Show runners David Benioff and D.B. Weiss did six good seasons based off the work George R.R. Martin did, and then, probably predictably, failed to stick the landing.
Benioff and Weiss got the lowdown from GRRM about how the books were supposed to end. He gave them some highlights and a few major plot points, and told them where the major characters were supposed to end up. Season seven and eight of Game of Thrones play like Benioff and Weiss made a bullet list of the things GRRM told them, and then plodded down the list checking items off without bothering to make them mean anything.
I think that’s the most damning thing I can offer about this finale. It was boring and meaningless. I can’t even bother with being mad about it or disappointed with it because it was so telegraphed and banal. After the long, dry fart of a thing that was episode four, we could all see how things were going to go.