To everyone complaining about MCs choices to stick around and forgive the girls for not preventing the blood drain/memory wipe, I completely agree that if I were the MC, I'd have left as soon as it was revealed. The blood drain I can forgive. Messing with my memories I can't. I'd have gotten in my truck and left...and then the game would be over.
So, you can either tell yourself that that's what you did (and then delete the game) or you can suspend your disbelief and enjoy the rest of the game.
There is no mind control. We have been explicitly told about memory wiping (which sucks) and that drinking the blood lowers inhibitions, but it isn't a drug/it's not addictive. It can't force someone to do something they don't want to do.
If you're saying that there's mind control, you're reading more into it then has been revealed so far, and is actually contrary to what we, the reader, have been told.
So, accept the fact that MC is willing to risk his life for this adventure, that he is willing to forgive these women for what's happened (even if you couldn't), and just enjoy the story because the Dev doesn't come here. He's not going to see your complaints and change the story, or the choices the player makes.