The Devil Wears Prada was very hard to stomach and was all too easy to relate to. But yeah, if that was me, I would have walked out and quit as early on in the movie as the interview (and yes, I have walked out on especially crappy job interviews). On a job interview, the person being interviewed isn't the only one making a first impression. A bad job and a bad manager will only turn you into a bad person, so if something seems very wrong on day one, run.