Honestly, many atheists simply don’t care if a god exists or not.
Yes, I think most atheists are in that camp. They rarely give such matters a thought.
Ideological atheists are more interesting. They may spend a good part of everyday typing about religion, something they sincerely believe to be a waste of time.
I have a pet theory on this, but make no claim it's true. Just a theory.
There is a human need to have a relationship with reality. This might be called something like "The Inquiry". It predates religion. Religion is just one response to The Inquiry. Long subject, enough for now.
Perhaps I keep typing with forum atheists from a belief that they must be sincerely interested in The Inquiry, or they wouldn't be typing on these topics every day. They just don't find religion to be a suitable response to The Inquiry, that's all.
But they don't know what else there might be. And so there is a sense of disappointment, anger even, at the failure of religion to deliver the goods for them, despite some rather grand promises.
If any of this is true, to the degree it might be true for any individual....
A solution might be to be loyal to one's own speeches and simply dump religion, forget about it, let it go, walk away, don't look back. Forum atheists claim to have done this, but really they have not. They're still typing about religion, day after day after day. That's not letting go, that's hanging on.
I suggest The Inquiry can be pursued just as well with reason, to similar places reached by religion. But we have to actually do reason, and not confuse it with ideology. If we do reason, real reason, all the fantasy knowings, theist and atheist, will all fall away.
And then we are left with nothing. A whole new realm to explore.