Red shift has no need for dark matter to explain it. Your getting your facts wrong. Red shift is part of the evidence for the Big Bang, and that is backed up by the microwave background radiation. Dark matter was invented to account for inconsistencies between what is observed in the rotation of galaxies and what theories predicted for their estimated mass. Completely different. Dark matter and dark energy, if they exist, will affect the expansion rate and hence the red shift, but its not the cause of it.
The alternative theory that explains the mass discrepancy without dark matter is a form of variable gravity theory. Personally I prefer this because its less clunky and doesnt rely on some particles which seem to influence everything except scientists instruments.
It seems to me that the observation the acceleration of all other galaxies away from us posed a bit of a problem, in that it would point to our being in a privileged position. It was thus explained that this acceleration would be observed on any other galaxy, as well. Thus, galaxies were not accelerating away from a central point, of which we were either in or very close to; rather, they were accelerating away from every other galaxy due to the expansion of space itself. This force of spatial expansion was posited as an unseen and unobservable force, termed dark energy. The problem is that this was nothing more than a pure assumption, not grounded in observation or in collected data. It was required to maintain the preconceived notions of Copernicanism, thus adding complexity into what would otherwise be a very simple conclusion: a dethronement of acentrism.
Not to mention other problems for the Copernican establishment, such as the quasar distribution problem in which observable quasars formed 57 concentric shells around our position. That's what happens when people let their personal philosophy cloud their reason: they accept all manner of false abstractions and deny their own commonsense experience.
Luckily, certain scientists are now questioning the dogmas of the establishment and are arriving at the same conclusion: perhaps the Copernican principle is irrational. For instance, these scientists questioning the need for dark energy and our privileged position:
http://www.physorg.com/news141617439.html