Your backstory is ... harsh. To put it mildly. Thank you for the trust.
And if people knew, like I (and everyone reading it later), they would care even more.
We usually just don't know... pain can't be seen...
While I can't relate to all of it, and won't share too much, I can tell you this: I can relate to a many things in your story. Especially the harsher parts. It may not be comforting now, as the past can't be changed, but there are others much like you, who have gone through lots of sh*t in their lives. And made it! So sharing is a way to bond, to find others who understand and can even help you.
You went through all this and still managed to make something good and artistic. You should keep that spirit and one day it will help you deal with the trauma of the past (maybe trough a game?). YOU made it! Keep going, it's getting better :D