There are other possibilities too. This guy may just have some of the worst luck there is. My dad had a similar problem with finding deer for a while. He was practicing alot and was great at the range and from elevated shooting positions. He just had issues with shooting at a live deer because he was thinking about it too much and worrying about the deer ducking the arrow and trying to compensate until he ended up being drawn too long and making a less than great shot. There is just more to the story on this guy probably and would hate to be quick to judge.