We (well, Einstein & Co. I was not involved.) made models about how the universe works. Then when looking at the broader scope, we noticed that the models differ from reality. So instead of saying the models are wrong, we invented "dark matter". Some unmeasurable type of matter that is responsible for the difference of how reality behaves in contrast to our models. And then we invented dark energy.
Now to make our models "work" we have to assume 85% of the matter in the universe is made of dark matter. And 68% of energy in the universe is made from dark energy.
How about just saying that our models do not work on large scales?
I have a lot more arguments that prove dark matter is a hoax. Let me write them down in dark text (an unmeasurable form of text). Here we go: