[What is more, the big bang theory can boast of no quantitative predictions that have subsequently been validated by observation. The successes claimed by the theory’s supporters consist of its ability to retrospectively fit observations with a steadily increasing array of adjustable parameters, just as the old Earth-centered cosmology of Ptolemy needed layer upon layer of epicycles.]
This is blatantly false. The Big Bang theory makes a great many predictions that are supported by Quantum ElectroDynamic theory (QED) and vice versa. QED is known by physicists to be the most successful (the most reliable and the most robust) theory in the history of science.
Whoever is writing this stuff doesn’t know the first thing about science.
And those predictions would be?