This manga is giving me conflicted feelings. On one hand I do not condone any type of violence and our MC is clearly having a little too much fun. He seems to be motivated by justice, but he remains a psychopath, which means he can't really be trusted. If he killed anyone else he wouldn't be different from the others.
On the other hand... all his victims really, REALLY deserve what they get, so you can't help but feel satisfaction when they are inevitably punished for their crimes. One of the few rapists in manga and probably in real life, too that received exactly the treatment he needed to experience.