Satan, Adam and Eve et al is an invented get out clause to explain why the supposed all powerful being is unable to prevent bad things happening, if there really were such a being they could do anything with just a click of their fingers.

I became an atheist because, with careful examination, I came to the inevitable conclusion that the whole God thing was nothing more than a construct orignally by men who knew little of the world and which was embellished over the years mostly to answer overwise awkward questions that could expose the construct for what it was.

I do hate unfair treatment, serious maltreatment and cruelty etc.

If that is true why on earth do you have any support for the monster that is the God of the Bible, he was plainly guilty several times over of all those.

And all the firstborn in the land of Egypt shall die, from the firstborn of Pharaoh that sits upon his throne, even unto the firstborn of the maidservant that is behind the mill; and all the firstborn of beasts.

What did they do wrong?

And he turned back, and looked on them, and cursed them in the name of the LORD. And there came forth two she bears out of the wood, and tore forty and two of the youths.

A somewhat drastic punishment for laughing at a man's bald head, just a tad unfair methinks.