Before he got wrongfully arrested by the colourist police, Hel's Psychopathic Parents simply hated him for who he really is, because his plain skin seems too dark for skin lightening cream to handle, even though he's not a Romani (truth; the skin colour of some Romani is pale peach). The parents, named Armin and Ema Antich, are terrible because he's simply not the offspring they've expected. Because of this, they deny talking about his past and then abandoned him as a result, due to a suspicious family tradition began by Armin's ancestor and ancestress.
Thereafter, he's the one unwanted by everybody but the colourist cum mentalist police, who couldn't understand but decide to harass him simply for his skin colour and not anything else other than his rather blank face, an indication of moderate autism.
Living with autism isn't as much of a challenge, as living with his parents surely is. He's mildly traumatised for now, until he has to walk away from the police or any perceivably dangerous threat with his self guidance.
