Is this actually good world-building?
So for some reason I started re-watching the show for the first time after the season 8 premiere, so here I am straddling my excitement for the conclusion and this newfound skepticism about the quality of the series in general. I still love the show for all the really powerful scenes and memorable plot developments, and even though a lot of them don't really amount to much in the long run it's ok because this meandering, amorphous structure is what makes the story so compelling.
That said, I have huge underlying issues with the world-building that I'm not sure are legitimate criticisms or just gripes, so I wanted to put it out here in a really awkward way. Also, if these questions actually have answers and I'm just ignorant, let me know!
1) Does it bother anyone else that no explanation was given, to my knowledge, of why the ice zombies and white walkers and whatever woke up now? Why there's renewed magic and dragons all over the world? Personally, I keep coming back to what the inciting event was, like that should be an important thing.
2) In terms of world-building, I just think it's kind of dumb to have this apocalyptic mechanism that will only evidently affect one of the major continents. Like, I keep thinking about everyone chilling in Quarth or on the Dothraki plains in season 8, and the Zombie King could march all the way to King's Landing or Dorne and it wouldn't even affect more than half this planet, if you include the continents we only hear mentioned.
I got a lot of other things that really irritate me, but I guess those are two big ones. I suppose my question is: does ASOIAF generally represent good or bugged world-building?