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.
I might get downvoted for this, but Breaking Bad. I made it into the second season, constantly annoyed at how massively unrealistic and terrible these people were to each other. People kept telling me it would get better later on and that I should stick with it, but after that failed to materialise I just gave up.
Same for me. I think I made it to season 3, but it was so annoying how everybody was just a massive asshole and over the top cruel.