Recently someone asked what I would rate GoT out of 10. I said 6... 6.5. Maybe that's misleading -- not only are ratings subjective, rating scales are subjective. Someone who binged GoT less aggressively than I, who was less invested than I, countered it deserved a much higher rating.
Occasionally House of the Dragon causes me to miss GoT. Then I remember GoT. I know people who couldn't care less about certain GoT subplots: Bran north of the wall, "Reek", even Dany in the East. The thing is that was most of GoT for me, especially the acclaimed middle seasons.
For me, GoT could be called "The Stark Arc", or "Winter is Coming." Actually I don't mind "Game of Thrones" or "A Song of Ice and Fire", though those don't hint at the copious subplots. The three things I care about most: the Starks, the winter, and the throne politics. All three took back seats quite often.
I miss GoT, and feel some urge to rewatch portions, until I recall words like "Mereen", "Shae", "Tormund", "many-faced", "Tarth"... actually most people and places and subplots. Lord of the Rings is subplotty, but sticks better to its central quest, and hosts a smaller ensemble. That comparison is unfair since I've dived deeper into LotR than GoT, so the subplots mean more to me. I bet if I read ASOIAF, or rewatched GoT, I'd feel a little different. But I still don't think I'd care enough about the manifold.