Smart to just flip the image.
Ultimately I guess it doesn’t matter where his nose is in relation to the charging handle. His neck might be in alignment with the rear of the stock in the fashion he holds it whilst aiming, the stock is up against his shoulder and from some angles a bullet pass-thru his neck might take off the top of the buttstock.
The reason I asked is that one of many plausible theories is that in the moments before his death, Crooks turned west and was pointing the rifle in the general western direction. In the discussion of when/how the stock was damaged, your flipped image would be consistent with Crooks facing west, pointing the rifle west, with the rifle correctly shouldered with his nose on the charging handle, and a shot coming from the south, thru his mouth/neck exiting his right neck and passing thru the buttstock.
Nah, I don’t think it’s determinative other than suggesting he was never “trained” by someone with solid grasp and/or military training on how to hold it. He’s a tall guy and this might just be more comfortable, he may have had bad training on how to hold the rifle and never been corrected. One could still presumably be capable but it’s just not the correct way to hold it. But many people, like great guitarists or baseball players, held their guitars or bats “wrong” too…
Edited: Something I had not considered but might be a factor is that he clearly has poor eyesight, wears glasses. We don’t know the nature of his vision but perhaps the red dot and/or iron sights are best seen from HIS vision by being farther back on the stock. So this might reflect his training and the best position for his face to best see the optics.