'why aren't my neurons individually conscious?' why can you assume a slide rule is but a neuron isn't? your consciousness doesnt stop at your 'skull', it extends to your fingers and "interfaces" with the world in various ways, which is effectively a weaker, slower connection. neurons in your brain are also not equally distributed to how much they affect your immediate consciousness, but they all play a part in it
Do you have a verdict for whether science can ever explain the origin of the universe? I can only doubt it could answer the actual hard problem of consciousness. I find most people, especially on here, to be blindly "science-optimistic"