IMO, very few atheists exist because a human that can’t worship some kind of god is not natural. Without any god, the universe is a place of random actions and nothing has purpose, except to exist for a finite period. The most primitive man knew that this was a miserable worldview and they sought to change it.
Most modern atheists are angry people who think they are punishing God for some perceived transgression or they are people who worship the concept of an all-knowing and all-powerful groupthink (usually in the form of government) as God. Either way, they are far from being a person without a theology.
I remember a pastor in the past boiling down the concept of a god in this fashion: “Your god is who/what you serve.” So just looking at what the atheists are in service to is what shows what their god(s) is/are.