I can't convince you that you are something if you are dead set on choosing to be nothing.

That we are embedded in the world does not mean we are meaningless or powerless.

https://medium.com/p/interdependence-does-not-mean-lack-of-individuation-ec8db0b45b9c

And no, neuroscience has not proven what you claim. You cite one experiment that has been rejected for poor methodology.

The worst use of your free will is to choose that you do not have free will. That is choosing a life not only without principles but without life.