Here is a 3 year walk through the confidence you should have in the scientific communities ability to come up with absolute truths.
As I like to say, "Science is fun, and sometimes helpful."
Science doesn't deal in absolute truth. Science deals in theories. Scientific theories are always subject to improvement. But science is cumulative -- the body of science grows to describe reality better and better. In many ways that your very life depends on, science is doing an excellent job. Although I'm not a cosmologist myself, I have confidence in cosmology to improve our understanding of the reality of the universe in the large.
Science isn't perfect. Scientists aren't perfect. Deal with it.