Asperger's, plus PTSD, or very possibly Borderline Personality disorder; with severe anxiety, and antisocial traits. Hell hath no fury like a long undiagnosed aspie whose been kicked around her entire life. I lack the subtlety or the brawn to be a serial killer, so I'll write about it instead, and see if that helps at all; though I doubt it very seriously.
Oh yes; and I paint: https://www.etsy.com/people/CLLewisArt
"I know that light is not for me; yet in my new wildness and freedom I almost welcome the bitterness of alienage. For although nepenthe has calmed me, I know always that I am an outsider; a stranger in this century and among those who are still men."