And the joke — the joke that teed up every other joke — was that “Chubby Rain” was obviously a very, very stupid idea for a movie. Netflix’s “The Last House” cost a lot more than that, but god damn is its rain chubby. The first major problem with that approach is that chubby rain is too silly to stop thinking about. It’s a particularly egregious problem in a thriller that would have worked just as well had it removed that detail altogether. The other issue is that “The Last House” was in no way designed to be the character-driven saga that its story demands.