I'm pretty awful when it comes to highly rated and raved series. My judgement of the series is a bit harsher than usual and if it doesn't satisfy me in any way then I drop (there are a few I somehow managed to finish though). With that said, here's a list of dropped dramas I felt were overrated and not to my expectations:
Strong Woman Do Bong Soon(Actually liked the romance, but hated the underlying crime theme.) The Bride of Habaek A Gentleman's Dignity Goong Hello Monster/I Remember You Kill Me, Heal Me Uncontrollably Fond Descendants of the Sun Boys Over Flowers Reply 1988 (series in general)
Descendants of the Sun. I've seen 4 episodes, put it on hold and the only reason why I might continue it another time is so I can know what people are talking about lmao. But until now I've been hating it a lot, really don't get the hype at all..
Definitively Reply 1997 and Misaeng. I don't hate these dramas to drop them but I just find them meh maybe I was not in the right mood for slice-of-life Dramas. Maybe I should rewatch them because my taste has changed.
Weightlifting fairy (dropped at ep 10 I think) Healer (dropped at 12 I think) dots (dropped at ep 6) legend of the blue sea (dropped the last four episodes) Uncontrollably Fond (dropped at ep may be 2) Hwarang (dropped toward the end)
There are many more these are the ones I remember. I just didn't like these, even though they are popular