Trevor,
Keep your head up. I know this has been a battle watching her, and it's always a hard decision to make when they get to the point of no return. Even more so when the animal has so much potential, but it's best to do what's humane for the animal.
Matt:
You did a piss poor job with packing and that alone shows me that you are not worth dealing with. It's not uncommon for an animal to remain "okay" until they are put through extreme conditions and stress, both of which happen during shipping, and even worse when they are sent through with no protection from those conditions. Maybe you've learned your lesson on shipping, but only time will tell.
I hope both of you are able to reach some resolution.