I'm not getting up, finding a manager, complaining, then going back to the theater after missing 5 minutes of the movie doing those steps. I asked them to be quiet, eventually they did. If they hadn't, I'd rather have just left and gotten a refund and tried again another day. Also,
I was outnumbered in the theater. Me asking them to shut up was technically ruder than them talking through the whole movie, as apparently more people in the theater wanted to have a side conversation than watch the film