Is There a Rejection of God?

The fact that I exist, and I have the capacity to think, is enough of a proof that Allah subhanahu wa ta'ala exists. We don't need any other proof for the existence of Allah, other than our own existence. By rejecting God because there's pain and suffering, it is as if they are saying, we deserve ultimate peace and ultimate luxury by virtue of our existence. And this is essentially satanic, right? Because what did Iblis do? What was Iblis's kufur? The kufur of Iblis was takabur, hala anahayurum min, hala ktari min nahre