I feel you. Although neither are ball pythons, we do have two problem feeders in our collection. It's particularly annoying since they are both smaller snakes and mouse eaters, as if any of the larger snakes skip a meal I can just chuck their rat feeder to my dumpster carpet python who never refuses and would happily eat his weight in rats, given the opportunity.
I get particularly frustrated with the female hognose, as I'd love for her to eat more/grow bigger/grow faster for both breeding and cosmetic purposes. Luckily she is up to size, but I still have dreams of a 1000g+ hognose female in the future, which probably won't happen with a girl who insists on eating small meals, infrequently.