I am 95% sure that Satan doesnt even exist (same for Jehovah), but in theoretical terms at least, do you think Satan was such a bad guy to question Jehovah's totalitarian regime? Isnt there a little 'Satan' in all of us ex-jws? He employs critical thinking, questions the status quo, and goes against what has been deemed 'righteous'. I think we need to re-think our ideas about Satan.
Another proposition: If Satan were all-powerful, instead of Jehovah, would he make a better 'God'? ( I am NOT a Satanist, I have no religion, just throwing it out there).