hold on, i got a disco elysium skill for this

Has Xexeezy ever elaborated on Johnny's backstory?

On his right shoulder (Which is where Unit Insignias go in military / state doctrine), I saw a "Deathcamp" and a "13" patch.... Is he from that kind of dystopia, where he would have involuntarily (as inmate or staff) been in that kind of environment? It's apparant he's a street hooligan in his present, modeled after Akira and Cyberpunk 2077, but does his self-destruction come from That? And from the survivor's guilt one would take from There?