This is a fine opinion to hold in general, but if you're going to tie that to the failings of a particular theory (dark matter), you better be able to be specific about what those failings are and how hubris and embarrassment have led to those failings.
Just claiming something is "obviously flawed" does nothing to advance science, hubris or not.
Dark matter is obviously flawed because it is clearly a patch on a broken paradigm. The hubris is related to the inability of scientists to even discuss that maybe, jut maybe, gravity is not the only organizing force in the cosmos (you know, we create plasma in labs with electricity, not gravity right? But let’s just ignore that completely because there can’t be electricity in space because hysterical raisins).
Or how about the discrepancy around quasars and red shift implying that maybe the doepler effect is not 100% transferable to space? Nope, don’t try that if you want a job or credibility.
The book that proves these dynamics historically is called The Structure of Scientific Revolutions.
Kuhn is interesting reading, but he does not give any guideline to predict or create the next paradigm. For every paradigm shift there is probably thousands of theories which just turns out to be useless blind alleys.
You allude to some alternative theory, but you are pretty vague about it.
Dark matter is a supersolid that fills 'empty' space, strongly interacts with ordinary matter and is displaced by ordinary matter. What is referred to geometrically as curved spacetime physically exists in nature as the state of displacement of the supersolid dark matter. The state of displacement of the supersolid dark matter is gravity.
The supersolid dark matter displaced by a galaxy pushes back, causing the stars in the outer arms of the galaxy to orbit the galactic center at the rate in which they do.
Displaced supersolid dark matter is curved spacetime.
Just claiming something is "obviously flawed" does nothing to advance science, hubris or not.