Yeah, that guy absolutely deserved that punch in the face. Whether he legitimately knew Hanae had trauma from the earthquake or not, he should never be so callous as to basically ignore his actress' distress just for the sake of making his movie.
BTW, if Kuso Megane Tachi is interested in taking on new projects, might I suggest a short manga called Artiste wa Hana o Fumanai by Marco Kohinata? I hear it's a really good story but it has no English scanlation anywhere. Plus it's only one volume long.