I'm not sure what you're getting at. Dark matter has been proven numerous times, is a predictive model, and is the only explanation that has held up to scrutiny and observations. It's very clearly the right explanation and we know how dark matter generally behaves, we just don't know specifically what it is.
See, for example, the behavior of the bullet cluster merger.
You have a fundamental misunderstanding of physics if you think that analogy is even remotely similar to dark matter.