Studies find over and over again that religious people have the highest divorce rates, the lowest education rates, the worst violence and murder rates, the most abortions, the most disease (especially sexually transmitted disease), the most teen pregnancies, the highest child mortality, lowest levels of happiness, the worst poverty, the shortest lives, and many more problems.
The most non-religious societies have the lowest rates of those problems and have the happiest, most trouble-free lives.
This is the opposite of what would be the case if there was a god.
The Chronic Dependence of Popular Religiosity upon Dysfunctional Psychosociological Conditions
http://evp.sagepub.com/content/7/3/147470490900700305.full.pdf
World Happiness Report website
http://worldhappiness.report/ed/2023/
Cross-National Correlations of Quantifiable Societal Health with Popular Religiosity and Secularism in the Prosperous Democracies
https://cdr.creighton.edu/bitstream/handle/10504/64409/2005-11.pdf
New Study Finds That Divorce Rates Are Higher in Counties with a Greater Concentration of Conservative Christians
https://web.archive.org/web/20180122023128/http://www.patheos.com/blogs/friendlyatheist/2014/01/19/new-study-finds-that-divorce-rates-are-higher-in-counties-with-a-greater-concentration-of-conservative-christians/
Red states, blue states, and divorce: Understanding the impact of conservative protestantism on regional variation in divorce rates
https://sites.utexas.edu/contemporaryfamilies/2014/01/16/impact-of-conservative-protestantism-on-regional-divorce-rates/
It Turns Out Christians Have More Abortions Than Any Other Religious Group In America
https://www.mtv.com/news/2679975/lifeway-christian-research-christians-have-most-abortions/
Religious conservatives lead the nation in search for porn
https://web.archive.org/web/20200117221519/http://www.patheos.com/blogs/progressivesecularhumanist/2014/10/religious-conservatives-lead-the-nation-in-search-for-porn/
Data Finds Republicans are Obsessed with Searching for Transgender Porn
https://lawsuit.org/general-law/republicans-have-an-obsession-with-transgender-pornography/
Also, for those who think religion might be associated with social ills, but not causative, there is now evidence to prove that decline of religion appears to be required for society to improve:
https://advances.sciencemag.org/content/4/7/eaar8680