No, I've known many people who have taken their own lives: friends, acquaintances, even people I had only brief contact with. And with very different methods — each chose in their own way.
I've also had friends who attempted suicide and are still alive, and none of them suffered any damage, not even minor.
What strikes me is that the vast majority of those who made that choice are dead.
Those terrifying statistics about survivors with devastating injuries honestly seem like exceptional cases to me — they obviously make the news, but they have no correspondence in reality — neither in my own experience nor in that of the people I know, not even distant relatives living in other countries. They too have lost friends or acquaintances to suicide, but I've never heard of anyone surviving with "horror-movie-like injuries."
So no, it's not something that worries me, because what's reported in numbers or sensationalist headlines doesn't reflect the concrete reality I've lived or heard recounted.
Lastly, I started a thread specifically about statistics, because I have a certain professional familiarity with how statistics are manipulated.
So no, I absolutely do not believe in all those stories of survivors and people left with damage — not in supposed neurological damage from hanging, nor from carbon monoxide poisoning.
Sure, there may be a few cases, but they're a tiny minority, so negligible they're statistically irrelevant.
Those who've truly lived close to these experiences, know this.