If the society would be completely blackpilled the only thing which would change is the way foids are treated. Sub-8 men would realise that foids would never have sex with them, so they would stop pursuing them. Foids would be a little depressed because sub-8 men wouldn't be there to satisfy their exaggerated egos.
Every normie and incel in denial would realise that world has nothing to offer to them and they lost a human the day they were born and foids only use them for their money and don't even give them boring starfish sex in return. They would nothing to live for, so the world would witness a huge increase in suicide rates of sub-8 men. Also foids would loose all privileges because sub-8 men are the ones giving them those privileges.
And regarding Chads nothing much would change. They have already won the genetic lottery and they will still get worshipped by foids.