There are 2 antonyms to the word “good”: bad and evil. Bad would mean “I wish the situation were different.” Evil means absence of some good that somehow both can and ought to be there. The very conception of evil is a profoundly religious notion.
That it ought to be “on earth as it is in heaven” but is not presupposes a good God who mysteriously permits us to live in a non-heavenly environment.
Suffering for an atheist is merely bad not evil. An atheist is like a diseased dog, suffering dumbly without trying to discern any higher purpose to the suffering.
As a result, atheism does not solve the problem of evil; it merely dissolves it.