Have said this before, but again:
MC is a manipulative arsehole, has just gone through some deep shit, losing the love of his life (who betrayed him and then died mysteriously? ah, the suspense!!), and has come out of it as a twisted, self-centred, self-serving cunt, with absolutely no loyalty to anything he says or does, just wanting to get the next conquest.....and he has developed some weird kinks along the way. He is on some sort of retribution path...
And all of the girls are lying bitches, with their own motives, none of which he actually cares about....
So, don't bleed too many tears over it, just enjoy the fucked-up ride, haha