I'm going to second what gnaritas has said and suggest that perhaps you just have an insufficient understanding of the evidence and the current state of cosmological theory.

Also, despite the name "dark energy" has no relation to dark matter and the evidence for either does not overlap. Moreover, the inability of one theory to explain everything else in the universe does not invalidate that theory. The theory of biological evolution fails to explain the existence of neutron stars, yet it is still a valid theory.