Anton Petrov also has good analysis of papers like that, here's him explaining why no the observation does not support the black hole cosmology as long as we're not cherrypicking https://youtu.be/xXSV9JaWxCE

Doesn't mean the paper is shit, it always helps drawing parallels to notice differences and refine our equations, but the sensationalism must prevail for all the news sites reporting on it I guess.