Based on the Edgar Rice Burroughs novel “A Princess of Mars,” John Carter is a fascinating film in a way. There’s really nothing wrong with it in a technical sense -- the effects, the acting, the plot (what there is of it) are all very standard for modern Hollywood films -- but the film stinks. How badly? How about $161-million-loss-and-the-Disney-studio-head-resigned bad. Let’s talk about why this film failed.