Um if you read you would know that white hair is doing nothing precisely because he knows himself. And it would also be clear that things are not exactly the same with regards to the MC's past self. Even in an earlier chapter it explains that his past self is not reacting the same way he did when he younger. In this chapter it explains why: he's obsessed with white hair, so much so that he's throwing his usual behavior off. Besides, if I reincarnated into a homeless person with no power and into the past then met myself at 30 years of age I would STILL be at a disadvantage. Obviously. Bbda.
You know all of your secrets, your doubts and weaknesses. If someone came up to me, telline me about stuff nobody should be knowing, saying the stuff that hurts the most I'd be terrified. That goes for everyone. Just bc he's so obsessed with white hair, doesn't mean he's a completely different person.
The concept is so interesting but the execution is absolutely low tier. White haired guy (I'll call him poor dude for now) is nothing alike to the rich guy. They're supposed to be the sam person but share zero personality traits or abilities. I'm sorry, if I was reincarnated and past me tried to anything to me, I'd absolutely demolish myself. And this goes for everyone. You know everything about yourself, so obv you'd be able to take yourself down. But poor dude just does NOTHING. He just hates his past self and is constantly raped and just waits for something to happen. At this point, the selfcest asepct isn't even there. It's more like a reincarnation into the past. It's nothing but rape, rape and rape. Rich dude kidnaps poor dude and forced him to be his sex slave who hates him until he falls in love with him bc hes actually good. Nothing different