Kids get cancer, and disasters happen for all sorts of natural reasons. Atheism is immaterial to any of it. It's simply a lack of belief in god or gods.
If you believe in the one God, that doesn't really fit with Hindu's for example, with Brahma, Vishnu and Shiva. Paganism isn't really a religion, it's a collective term for a variety of beliefs, "one god" is not a requirement, some believe in more, some less, and some don't care.
I don't dismiss the koran, there are some interesting stories, but something being written in it, is only proof its written in it, it's not a credible reference source in itself, few books are. Proof of that are the hadiths, which themselves need further referencing.
You still haven't answered the question. Why did your god create suffering, when he had a blank sheet to work with and unbounded power?
Most of this doesnt make sense and tbh shows your lack of knowledge
For example Hindu scripture points to one supreme God. All the others are his creation.
Credible sources are dependent on our stance. So for example I don't see Dawkins as credible or evolution in all its forms. Bug I am happy to discuss using those terms
Even the word omnibenevolent is something thaybwasnt traditionally used by Islamic scholars, its origins are more in strawmen created by non believers. However its something that is here so we discuss it rather than ignore it. You see the quran as simply stories but I see it as much more and there are verses where Allah is explaining things for me.
I am not sure your question can be answered ti your specific satisfaction as the perimeters you set are changeable and ultimately strawmen.
Let me put it this way, If I believe God created us and put us on the earth as a test (simplistic on purpose) then the potential for evil not to exist would be unjust and oppressive.
Similarly with suffering. Firstly we need to define suffering, as I said earlier is drowning in 5 minutes suffering or living until 90 with pains aches etc, add to that the concept of heaven and the drowning of a believer to be like martyrdom ie a straight pass to heaven, is this now a bad thing or a good thing?
There is also the issue about test and other passages and explanations to explain suffering if we choose to believe. So God says here you go have a planet with everything in it for you but keep it nice. We respond by screwing it over and when the **** hits the fan do we learn? No we stockpile weaponry etc
God has always said that if man exceeds certain limitations then he will be reminded/punished/destroyed etc (depending on which version you read). To then do the whole wars and other crap and say I can't believe in a Gid that allows this to happen or question how does your God allow this to happen is equivilant to doing a Hammond. Yes I mean Richard. Oh look I drove fast and nearly killed myself on a straight road now I will do that on a bendy one and see what happens.
I was reading once that a tsunami was described as a "legend has it" type of thing but we have witnessed them in our lifetime. Do.we now say how can God allow that to happen when the "stories" in scripture already show us how when past generations exceeded the limitations they saw similar. When people asked why good people also were killed then it was said they were saved and the difference is where they will be in the hereafter