So fucked up. Very important chapter. It was already gross to make the little mental calculation with the Himekawa reveal, but it's another level to see how young was Hikaru when he was abused. Airi could have been already despicable as a cheater but she topped it off by being a grooming pedo to boot. I totally get why her husband shanked her and killed himself after, I assume, Hikaru managed to let him know what she did.
I think Aka clearly wants to make the entertainment industry the actual antagonist, and not really Hikaru with this background, but still, no matter how fucked up the past it doesn't rob anyone of agency later on. Ai's murder was already enough to earn him the electric chair, but reading back chapter 109, killing Yura Katoyose, that bright and bubbly actress, was so disgusting and pointless. It seems he found a twisted way to cope with murder, as it gives him power Airi and pretty much everyone on those sets robbed him off, but this is obviously not it.
If he went all Dexter Morgan on awful people in the industry, I'd get it somehow but he's irredeemable for going after innocents.