How about this BIG PICTURE?
All the pain and suffeering for 6000 years was so that those born could have a chance to have eternal life later on Judgment Day. The choice was never to be born or be born, suffer a little during one's imperfect life, then have the chance for eternal life after Judgment Day when those relatively few years from the first life would soon be forgotten.
On the spiritual side of the scale, Satan would get the death penalty for being the murderous angel that he is. Had there been no opportunity for sin to occur, Satan would still be alive disturbing the peace of all the angels in heaven.
God gave Satan an opportunity for a way out of his miserable existence under God's sovereignty, which he willingly took with the satisfaction of killing billions of potential humans. Only God turned the tables on him with the ransom sacrifice and the resurrection. But that was expensive and part of that expense is the temporary suffering of mankind being born in an imperfect world and in an imperfect state.
But in the ultimate end, the righteous whom Satan murdered when he caused Adam to sin will have a second chance. That's worth the pain and suffering and the high price of Christ's death as far as God is concerned. The life of righteous humans was something that valuable. Satan's rebellion thus is most marginalized in this manner.