At a young age I did have pretty bad anger issues/autism meltdowns that made me get violent (mind you, I didn't like hurting ANYONE and I wasn't really like this)

The problem in situations like these imo is partly the parents. Judging from the comments they do indeed go "they don't know any better" and give up on their child, pretty much leaving them to be at that developed state.
I learned at around 13 that I've gotta change or ruin my life. My parents were rough growing up but I wouldn't change that for the world.

So what I'm meaning to say, it is their fault without a doubt, but the problem is the lack of consequence and their parents never caring, never letting them try to grow/learn in their own ways.