I agree that you should make the best shot possible to eliminate any suffering. That includes using the right weapons for the game your after. So you could have pick a better arrow point or a better weapon yes, but you live and learn.

No just remember that animals don't have Doctors or Hospitals. When it comes time for them to die, nature is usually more harsh than hunters. An old deer that starves or is taken down by coyotes will have more suffering than what happens when they are taken by hunters in most cases.