I started watching gore when I was really young, like 11 or something. I was already very depressed at that time and seeing such videos traumatized me, of course, but I feel like it helped me stop my sh addiction.
When I started to watch extreme gore (beheading and such) I was 13, I found comfort in these videos, when I watched them, I felt like I felt the pain that person felt at that moment, which helped my mental state a lot. I had a lot of nightmares because of it, but it weren't nightmares where I watched someone getting killed, mostly it was me getting killed in a very brutal way. But that again helped me with my mental state.
If gore wouldn't exist, I would've probably already been dead by now. Nowadays, I don't watch gore that often anymore, but still a few times a month.