Inflationary Cosmology

I'm skeptical of all of the theories described in the abstract below, but I lack the expertise to say with confidence that none of them are correct. 

I am skeptical because, in short, I think that a more accurate description of gravity which gives rise to apparent dark matter and dark energy phenomena, and a mirror universe model in which an anti-matter universe very similar to our own flows backwards in time from the Big Bang, is likely to explain the observations that inflationary cosmology seeks to explain without requiring an exceedingly brief moment of cosmological inflation very shortly after the Big Bang. 

There are peer reviewed published articles that make claims along these lines, but I haven't devoted the time necessary to gain a firm grasp of this literature.

We give a brief review of the basic principles of inflationary theory and discuss the present status of the simplest inflationary models that can describe Planck/BICEP/Keck observational data by choice of a single model parameter. In particular, we discuss the Starobinsky model, Higgs inflation, and α-attractors, including the recently developed α-attractor models with SL(2,ℤ) invariant potentials. We also describe inflationary models providing a good fit to the recent ACT data, as well as the polynomial chaotic inflation models with three parameters, which can account for any values of the three main CMB-related inflationary parameters A(s), n(s) and r.

Renata Kallosh, Andrei Linde, "On the Present Status of Inflationary Cosmology" arXiv:2505.13646 (May 19, 2025).