That's all good and well but here's the kicker to your basic statement of "No Satan = No suffering"
1.) Who/What created Hell, according to the Christian religion?
2.) Who/What created Satan, according to the Christian religion?
The answer to both questions is the "benevolent" Christian deity. If God is benevolent why did it create a being capable of causing suffering, a place whose sole purpose is to torture and inflict suffering, and allow the suffering to continue?