I really can’t see why nobody has posted this before, but his butt is totally unaffected by the fact that he is resting all of his mass on it. His gluts are firm and look great in theory, but there is actual compression that occurs when you sit on them and this is not shown in the picture. Because of that the picture looks stiff and unnatural. I would change that to make him look like he is actually sitting down on his butt, which would make him integrate better with the picture.
He is also too firm overall. If he were really dying he would be slouching more or leaning back against the rocks. His right hand would be drooping instead of held horizontally like that, and his toes wouldn’t be so tensed. Because of that his legs would not be holding themselves so firmly and they would be splayed and stretched out at least a little bit more. I also think that his face should be bowed down and partially obscured by his left arm. I would also make it deep in shadow. I don’t know why but that really does something for me, and it makes it look more like he is despairing at the inevitability of his death instead of just thinking about what color rug he should buy from the home depot (for example). I also have an issue with the arrows. They shouldn’t be sticking out of him at exactly the same angle. This make it look far too geometric and ordered, and when one hears those words, emotion is not what comes to mind. I would make one of the arrows at a different angle, and skewed away from the viewer or something like that.
The last thing is that there should be tons of blood coming out of his neck wound. If you look at a medical anatomy book, there are many prominent blood vessels running through that whole area of the torso and this would mean that there would be much more blood coming out of a wound in this are.
I like the picture as a technical piece, but it doesn’t evoke much emotion as is.