If god refuses to do anything about satan, then satan is simply god's agent: meaning everything satan does, god is fine with-- in fact, god approves of.
Or? God is so weak, he is unable to halt anything satan does, thus satan is stronger.
(Or neither exist in the first place, of course)
There is no scenario where satan is real, that leaves room for god to be GOOD.
Agreed. You can't create the Universe, threaten the destruction of all sentient beings and allow Satan to wander around to muck it up if you are wanting to be thought of as only Good. There must be a higher sense of the meaning of what is Good than the plain, rational one...but such a thought strains the credulity of many a rational thinker.
But there is a context for understanding at a higher level to our rational one and it too, ironically, is based on a rational system. Rational truth cannot be understood simply as the set of all rational theorems individually proven by repeatable experience...it must also be understood that these rational theorems describe behaviors in reality only partially and that there reproducibility is within certain boundaries.
I think that this higher truth, this "systemic" truth, where rational behaviors interconnected in a web of impact and influence, can take just about any scientific truth or moral truth and produce a contradictory outcome when those boundaries are breached. Sure the law and order of our mundane reality keeps us in those boundaries most of the time. But on a regular basis people seem to need to escape those boundaries and to do so they need to understand what is right or good beyond what is rationally definable.
Back in the day of early Christianity I think that Jesus was seen as an utter revolution. Today we have adopted many of the teachings of Jesus as a matter of course. Now we can see more clearly where there are some gaps in the understanding of the New Testament authors. But I think that the New Testament speaks as much to today's moral reality as it does to an attitude toward how to transcend any day's rational morality.
When I invoke the figure of Satan I typically do so in the context of personifying how we can fool ourselves with an unswerving alignment to the understanding of our deeply held rational rules for what is good. But always these rules, taken too literally, can lead to a feedback loop that will undo the good that such rules were meant to ensure. All is in a balance.
No understanding of what is good or what is true is "an island". Each understanding is embedded in assumptions of what else is true such that these other assumptions tell us instinctively whether a single rule or truth is true or not. Taking the time to unravel these interdependencies leads to humility and a wonder at whether that higher level of understanding is attainable by humanity and whether it will "come to be" as a reality in this Universe. But as we look back toward the Big Bang we can also be awed at how the Universe appears to grow and evolve like an ever-opening flower into what can, with infinitely more complexity, look back at itself and see the history of its own becoming.