Pretty sure. The problem is, that neutrinos are too light, and when they are produced in the early universe they are too fast. That means galaxies do not form l

Pretty sure. The problem is, that neutrinos are too light, and when they are produced in the early universe they are too fast. That means galaxies do not form like we observe them. Basically, neutrino dark matter would "orbit the outskirts" of the galaxy instead of building a defined center.