Black people love coming up with all sorts of crazy theories but ignore the simple ones that work. "White supremacy" hasn't stopped the Asians from making more money and being more successful than whites or Hispanics from quickly setting up businesses and slowly moving past us.
What exactly is this "white supremacy" anyway? why don't we focus on ourselves and build our own businesses, improve our communities, schools etc and become independent of this white supremacy you keep talking about.
We wouldn't worry about white supremacy or what white people were doing/thought about us if we didn't depend on them for our livelihood. Stopping that that dependence is the only thing we should worry about.