Why hate the mother for Gosha's (and his gf) fault? I mean she didn't ask to be born different and it's Gosha who, knowing how bad hybrid life gonna be, decide his desire to have a child important than how that said child gonna be suffer.
I'd be depressed as hell too if I was her. People will stare and talk shit so I'd be a shut-in too. I know she should be stronger and be the better mother but really, in the real world not 'too good to be true' fiction, how many would be that strong? It's one person against the world. It's a rare case and she would feel very alone. Gosha didn't even try to actively help help her too.
For me I'm blame Gosha more than her. He's kind dad and grandpa, I know that but I think he's too naive