The primary evidence that religions aren’t “true” are the religious texts themselves: filled with easily disproved falsehoods and a primitive understanding of the world. Evolution is not compatible with creation myths. The biblical Exodus never happened. Jesus was barely noticed historically, i.e. extra-biblically.
The issue is not “disproving the existence of God”, any more than we have to disprove the existence of Frodo Baggins. (Which gods, btw?)
The question should be, why should we take these obvious myths as anything more than that? The answer is that there’s no reason to.
Ultimately science can’t explain why there is anything at all, rather than the more likely scenario of there simply being nothing.
It’s not a question science can answer.
Once there is something, rather than the obviously more likely nothing at all, science won’t help you understand why physics > chemistry > biology is ever so precisely tuned to be able to give rise to everything necessary for complex life to arise.
Without resorting to circular reasoning.
There’s definitely an aspect of mythos in the, well, “creation myths”.
The religious texts of Christianity, Judaism, and Islam, have anything but a primitive understanding of the human condition, the human world. My understanding of the worlds other great religions is very limited, other than to say they appear to have served their adherents well enough to have got them this far.
The problems the world faces today are primarily those of frivolity, corruption, excess. No amount of science is going to help there.