Modified Newtonian Dynamics
There may indeed be Dark Matter, but the only reason to invoke it is to explain observed galactic/stellar rotations that aren't consistent with Newton's inverse-square law. Why are the various MOND theories so unfashionable?
Surely very slight tweaking of low-acceleration gravitation on cosmological scales is more in accordance with Occam's Razor, all the more so as gravity is far harder to measure experimentally than subatomic phenomena, which can give staggering accuracy .e.g. clocks accurate to a few seconds over the lifetime of the universe.