Does dark matter matter?

Does dark matter matter? You betcha! When I went to school we were taught that there are neutrons, protons, electrons, photons and a scattering of miscellaneous particles. That was all there was. Everything we can see or touch is made of those particles. Until someone found that galaxies were rotating faster than they should accounting for the mass of the galaxies. So some bright physicist invented dark matter. No idea what it is or what it does, except the effect gravity has on it. OK, It's a correction to the Standard Model so everything is accounted for. Still it took twice as much proposed dark matter than ordinary matter to make everything work out correctly.
EXCEPT.... there arose the problem of an expanding Universe, which according to all theories should be slowing down. Easily solved. Invent dark energy. As gravity is an attractive force, dark energy is a repulsive force causing the Universe to expand faster than expected. Another correction to the Standard Model. This time the correction is five times the total of dark and ordinary matter!
In an ordinary infinite series the 'corrections' get progressively smaller as the series gets longer. Here the corrections get larger. This screams for a single equation of four or five components to account for all the corrections at once. Sort of an Einstein move.
An Einstein move would be proof that we're all on this fligiht together.
Dick