Does source material count? I watched Attack on Titan and loved it and when I found out the final season was not the final season I read the Manga. Was disappointed by the last arc and haven't picked the anime back up, but at the same time was glad I got through it quick as opposed having the conclusion dragged out over years and then being disappointed like I was with Game of Thrones after a two year long wait. Which wouldn't have been as disappointing if the wait wasn't so long, and not a week by week slow delivery of disappointment over it being released all in one day for people to get over quickly.

It played a determining factor of whether I would watch House of the Dragon or not. Had the book not been complete I would not have watched the show not wanting to go through another multi year investment into stories and characters with a one to three year long time gap between season ending in disappointment.