So how is a said, non-existent being, God, supposed to be the greatest source of evil?

[Jay520]

Darev. Do you know the difference between

(a) creating rules against already existing bad things.

and

(b) willfully creating bad things, and then later making rules against them.

Human rulemakers represent (a). God represents (b). They are different.

There, now stop with your flawed analogies.