An offshoot of this thread, which poses the opposite question.
What shows (or movies, or books, etc) did you come into expecting to fall head over heels for, only to find yourself running away, screaming?
For me, the number one example is “Alias.” I had quite a few friends recommend it to me after I mentioned that I was a big “Buffy” fan, presumably because both are action-driven dramas featuring strong female leads. I gave “Alias” a try, and forced my way through the first three seasons before giving up.
It turns out that, despite their superficial similarities, “Alias” was essentially all the things that originally turned me off from “Buffy,” minus all of the things that ultimately won me over. “Buffy” is character-driven; “Alias” is plot-driven. “Buffy” leavens its drama with well-timed comedy; “Alias” veers erratically between ludicrous self-importance and unfocused silliness. “Buffy” had coherent season-long story arcs characterized by the slow burn; “Alias” devolved into “MUST HAVE PLOT TWIST AT THE END OF EVERY EPISODE” mode by halfway through season 2.
Most importantly, “Buffy” featured intelligent, likeable, and well-developed protagonists with whom the audience could grow to empathize; the characters of “Alias,” in contrast, seemed to have been written by a schizophrenic, with personalities and life histories constantly flipping around or being retconned, resulting in a confusing mishmash with no consistency whatsoever. By the end of season 3, I was thoroughly sick of J.J. Abrams and his apparent lack of interest in developing his own characters and could go no further.
Other things I thought I’d love, but ended up hating, include:
Star Wars: Episode I
Star Trek (the reboot film from last year)
Heroes (such a promising concept, but executed terribly - in fact, suffers from the same issues as I described for “Alias” above)