It's atheists who are making the positive claim, if they say that, because God's goodness and almightiness seem irreconcilable to us humans, therefore they are reconcilable in reality, and therefore there must be no Chrustian God.
What is the basis for making the human mind the measure for what can exist in the universe in this way? Since there are certainly things about reality that humans can't understand, on what basis do atheists claim that a solution to the problem of evil cannot be one of the things we don't understand?
Notice I am not saying that God necessarily does exist or that there is a solution to the problem of evil. Cofty has claimed that the problem of evil proves that the God of the Bible does not exist. But in order for that "proof" to stand you would need to exclude the possibility that a solution to the problem of evil exists that humans don't or can't understand it.
I know of no logical way to exclude this possibility, therefore I do not think the God of the Bible has been disproved.