Theories are not "facts," they are models of interpretation that have heuristic value and predictive efficacy. There is far more varied relevant data for evolutionary theory than for the Big Bang theory. But that is both a strength and weakness for evolution in this comparison. It is a strength for evolution in the sense that this theory generates far more predictions that can then be tested. It is a weakness in that evolutionary theory, though impressive, can be exposed to crippling weaknesses that don't encumber the Big Bang theory.
Microbiologist Michael Behe has effectively exposed some of these weaknesses at the cellular level by his case for irreducible complexity in various microscopic molecular machines like the flagellum. He was even subjected to a court case on this--a kind of Salem witch hunt, but I see no credible explanations from orthodox evolutionists that effectively counter his case. Behe's book, "Darwin's Black Box," has never to my mind been adequately countered. Irreducible complexity refers to the fact that certain microscopic systems utilize machine like components whose parts are each essential to function and cannot plausibly be conceived as the result of slow, gradual, incremental, adaptive change.
Similarly Oxford biologist Rupert Sheldrake has countered conventional evolutionary theory with a fascinating defense of "morphic resonance" as a key component of evolution. The fact is that evolution has nothing to do with the origin of life, but only with the development of life forms once life emerges. And consciousness is a relevant but scientifically unknown variable, whose relevance to random selection and genetic mutation is unknown. Threads on both Behe and Sheldrake would, I think, be very stimulating and productive. There are several YouTube videos for both.
It won't do to solve all these problems by simplistically appealing to the vast period of time life has been evolving on earth.