I don’t mean stuff that was obviously bad on sight (to you) and so you didn’t bother with, or even necessarily content you just checked out of before the first episode was done. But a series that you ultimately felt wasted your time and abandoned due to its total lack of quality.
Game of Thrones really went from having plot so intriguing and culturally iconic that it inspired fan theories across multiple decades, to the show with lesbians and dragons.