I'm with you that there was a lot of crash, bang, wallop at the end, but then it was building up towards a lot of crash, bang, wallop. Just as Return of the King was building up to the same thing.
Maybe it was the pacing that so many people reacted badly to. The other seasons were mid-paced whereas the final one just threw everything at you at once.
I agree with your sentiment - after a lot of talk and plotting, it was a big ‘brawl’ to resolve it all, as promised. The increase in progression of the plot was quite welcome in my view. If there was much more meandering it may have got stale. But it never really got a chance to. It was always progressing to an ‘end game’ and I’m glad it did before it otherwise faltered. I also think I
wanted to enjoy it, which helped a lot as with everything.
For what it’s worth, I dislike shows that go on and on without resolution and without high stakes. The stakes in season 8 were soooo high, maybe more so than any other show I’ve seen, anything could happen... so it was compelling viewing right to the end, for me.