I’m retired now but when I was practicing I saw a surprising number of cases of people who shot themselves in the head and survived. Almost all of them ended up with pretty bad injuries. One fellow put a high power rifle in his mouth  and pulled the trigger, but the gun was tilted too far forward and the bullet passed in front of his brain. One old guy shot himself and only succeeded in severing both optic nerves, so there was no brain damage but he was blinded. But I also remember one fellow who shot himself in the temple and totally destroyed his inner ear on that side (losing his hearing and developing a facial paralysis) but he somehow managed to turn his life around after that and, meeting him a year later, you never would have thought he had once been suicidal.