They are experiencing "bafflement" because they have hitched their cosmological wagon to the the weak gravitic theory of the Universe instead of recognizing that the electromagnetic force is also infinite in reach, but is 39 orders of magnitude stronger than gravity, . . and every where we look in the Universe we see evidence of electro magnetic forces at work. EM force is also scalable from the microcosm to the macrocosmic. . . and the phenomena we see out in the Universe can be duplicated in the laboratory in the microcosm. The theories of the Electric Universe are entirely explicable without having to invoke magical forces such as "dark energy," or magical substances such as "dark matter," to make the theories work.
I think so far, everything on the detection of dark matter and dark energy have been a "swing and a miss".
They're in a bind coming up with provable fudge factors :)