I have no interest in starting (or getting invested in) a novel series that may never be finished. I did watch the show all the way through, though. The last few seasons felt a bit rushed and were a bit disappointing, but I wasn't hugely upset with where everyone ended up. I just wish they'd had another season or two to flesh things out a bit more.
I'm not champing at the bit to see House of the Dragon, but I'm going to check it out, and I expect I'll enjoy it. I'll probably also check out the Arya and Jon spin-offs, assuming they ever get made.
The ending of GoT ruined my hype for this new series, I didn't even realize it was out yet....whereas before I probably would have been checking the internet religiously looking for any scrap of news I could find.
So I'll wait. Now if the reception is good, I'll watch it. I'm not going to "boycott it" just because of the horrific mishandling of the previous shows last season. But its got to earn it for me, whereas without that last season, I probably would have watched it day 1 sight unseen.