Regardless of any other collateral issues you may have with this hunt, the simple fact is that she wanted to go hunting and did not have the experience and guidance to make it a positive experience. I think we forget, or take for granted, just how much knowledge it takes to hunt.
Regarding the shooting and killing part of hunting - With experience you know where to aim because you are familiar with the animal's anatomy - regardless of the way it is standing. Then you can have a pretty good idea whether a hit was good or not and you have a decent idea of how long it should take an animal to die. You make observations from the animal's reaction to the shot, the presence, volume and type of blood on the ground, or on shrubs/brush and other factors.
There are additional factors too - ability to remain calm and think clearly, the time it takes to make decisions and then effectively act on them etc.
A new/inexperienced hunter got a tag. Someone in her community should have taken her under their wing, prepared her pre-season and been by her side giving her advice and guidance. It sounds to me like she spined it. He mentor should have know that when they saw it drop and it couldn't run away. They should have told her to give the elk a coup de grâce and then explained why it was necessary.
I feel bad for her and the needless suffering of the elk.