I also agree that this is not at all typical. It looks like your husbandry was just fine, so she must have been sick when you got her. I know it might take a little while before you feel like you're ready for another snake, but don't let this experience discourage you from giving up your dream of owning a snake. Royals are good hardy snakes in my opinion and though they are known to be picky eaters one rarely dies because of it.