RE: I'm so PISSED at my buddy right now!!!
I have an ex father in law that was just like the friend you mention. He got a new Hoyt Havotec and new arrows and montec broadheads. He also got a climber stand and felt he didn't need to practice with any of it. I tracked 3 bucks that we never found and finally got fed up with him. He would never tune or shoot his hunting setup and always had an excuse. I also helped him out of a climbing stand snafu that could have ended badly.
As much as I loathe him for his hunting ethics, I did love hunting with him and sharing time. The key now is to use this situation to validate the importance of shooting regularly, practicing with hunting arrows and taking ethical shots. Hopefully your friend will realize the importance of responsible hunting after this experience.