GOAT- what happened to you has never happened to me or anyone I know, so I can't relate there. But you have to realize that there are people who have endured much worse things and people who have cake-walked through life, and among BOTH types of people you have some who carry a positive outlook in life and those who carry a negative one.
It's your choice, man. Think about it- if you survive to adulthood with all the experiences that you have had, and the more bad ones that will surely come, you're going to be so wise & so strong that you'll be able to help not only yourself but soooo many other people. Better than anyone else could do, especially better than me working in my library job in a Chicago suburb.

But's that's ONLY if you survive it all with a good attitude, a positive outlook, and a healthy yet fierce level of competitiveness.
To make it, you're going to need a pillar of strength that's going to be unbreakable, unshakeable. This is where God comes in, for myself at least, and for many, many, many other people. You said, "I'm now almost certain there is no God" - why? PM me, or we can talk right here, it doesn't matter. I believe it to my bones that God exists, and so have everyone from billions of so-called "peasants" and "bums" to some of the biggest scientists ever: Issac Newton, Albert Einstein, Pascal, and Stephen Hawking.
Pascal said this:
"There is a God-shaped vaccum in the heart of every man, which cannot be satisfied by any created thing, but only by the Creator, made known by His Son, Jesus Christ."
God by
definition is good. But obviously that doesn't mean that bad things don't happen. We all have free will on earth, and as long as people (all people, religious too) decide to sweep God under the rug or straight flush 'em down the toilet, there's going to be sin, and there's going to be suffering. But God is the ultimate strength & support to encounter it all with, thankfully. Here's a really comforting passage from the Bible:
"And we know that in all things God works for the good of those who love him, who have been called according to his purpose."
If you look hard you'll always find good, no matter how much crap you're going through.
Just believe that you're going to make it through, GOAT, you'll be fine, man. Martin Luther King had just about every crime of hatred invented done to him, but he just said,
"I don't know what the future holds, but I do know who holds the future!"
hang in there my brother- trouble don't last always
