Silco didn't have a redemption arc. He was a piece of shit from beginning to end.
His last words were telling a mentally unwell person their mental illness was fine and they should not try to get better while trying to kill her sister for the 78th time.
It is really illuminating how people can look at a sister NEVER giving up on her sister, despite what she does, and considers hating that, while a child murdering scumbag crime lord who makes someone's mental problems worse and manipulates and gaslights them is loved.
Again I think the only reason is you people are pedos obsessed with muh daughterfu so you don't recognize the obvious manipulation of a child and hate the family trying to rescue them