@Exile The author has made it clear time and time again that Peter hasn't been a victim for a long time now, he has just been falling deeper into the rabbit hole every passing chapter. Peter has no one to blame but himself for cheating on his fiance with multiple women over a long period of time.
when You'd think is weird the strongest man on the planet wouldn't be able to handle his lil sister, then you realized that lil sister is literally guts....