After spending many years researching the foundations of cosmological physics from a philosophy of science perspective, I have not been surprised to hear some scientists openly talking about a crisis in cosmology. In the big “inflation debate” in Scientific American a few years ago, a key piece of the big bang paradigm was criticized by one of the theory's original proponents for having become indefensible as a scientific theory.

https://blogs.scientificamerican.com/observations/cosmology-has-some-big-problems/