something is exerting a crazy amount of gravitational force on all the matter that we can see, and there's no explanation for ordinary matter on the periodic table accounting for the massive difference in the amount of visible matter vs. the amount of mass required to explain those observations. And no one has come up with a modified theory of gravity that explains those discrepancies nearly as well as dark matter.

So until we have a better theory, the Lambda Cold Dark Matter model of cosmology will continue to be the best model.

It's frustrating that it hinges on these particles barely, if at all, interacting with anything else, other than gravitationally. But the universe is indifferent towards whether we can directly observe it or not. The idea that some particles have extremely weak interaction is not far fetched. Trillions of neutrinos are passing through you right now without interacting