While I'd never have any illusions of wholesomeness with a manga having Rapeman as a title, I'd have to agree that this is really way over the moral event horizon. Had it been the bitchy, evil women, then *maybe* it'd have a shred of audience empathy. But Rapeman really goes out of its way to destroy that with paid assault against an innocent minor. It's not like Rapeman is evil, and we get to follow that journey (yay revenge porn). No, it's just episodic professional jobs with no growth at all. It's like a slapstick gag manga, except as violent porn.
I'd still read it just to see where it goes, but I fully understand the drop.