Did you ever wonder that as a JW?
If all the trouble on this planet is down to Satan and the demons, why not just get rid of them and then leave humankind alone and see how we go from there?
Wouldn't a God who "is love" (1 John 4:8) full of mercy and justice at least try that first? wouldn't that be a sensible plan A?
Why the need to abyss Satan and the demons and also slaughter 99% of the human race at Armageddon at the same time?
Eve was deceived, she was naive. All her offspring were then born imperfect, doomed to die. It's not the human races fault - we are all born into sin and death! We only live 80-90 years then croak. We're pathetic, and you're soon going to exterminate us all for eternity?
Come on Jehovah, give us a break!