The whole "being a douche" to get women is bollocks.
It's called confidence. Women like confidence. This is just a typical thing said when people lack confidence and are jealous of the people that have it. You don't need to be a dick head. You just need to have balls.
If you don't have confidence or refuse to show any, you're going to have to settle for a wounded animal.
Sorry if that's harsh, but I get fed up with the whole "I need to be a total dickhead to get a girlfriend".