The wicked, from satan on down to his lowliest minion cannot do a wicked thing except that God has allowed them to exist. And God allows the wicked to exist for his purposes.
Take the example of Job, Jehovah allowed satan to do what he wanted with Job. He did not make satan mistreat Job, satan did so of his own nature and volition. Satan did what he did for his purposes - to turn Job away from Jehovah - and Jehovah allowed satan to act as he saw fit for his (Jehovah's) own purposes - to demonstrate that some people will remain faithful to Him no matter what.
In Eden, satan (the original serpent) did what he did to turn the human creation away from it's God and creator. So, he had his hopes. God allowed it to take place for his reasons. His reasons were the eventual freeing of mankind from the enslavement to corruption that satan had just enslaved mankind.
So satan did not subject mankind to corruption with the hope that they will one day be set free from corruption, his hope was eternal enslavement to corruption. Although he did, as you note above, subject humankind to enslavement to corruption.
But over and above that, God allowed it to happen, allowed mankind to become enslaved to corruption for his purposes: the freeing of mankind from satanic corruption.
That is an improvement of what you said before, although you have no idea who or what the Adversary is. In Job, the Adversary works for YHWH, doing his bidding, doing what YHWH commands him to do. Therefore, if YHWH commands the Adversary to cause suffering and death then YHWH is the cause of suffering and death. Which brings you right back to what you said before, "God subjected creation to futility in order to free it from futility" which is absurd.
No human Father would cause his children to suffer in order to free them from suffering. I suggest you "rinse and repeat" our discussion from the beginning (post #365), because you have missed an important piece of information. Otherwise, you will continue to speak absurd things about God.
This is where Reason and Evidence come into play. Without it, people are just saying confusing and contradictory things over and over. And atheists keep pointing it out. Then Christians keep using circular logic to defend their position as you have done just now and cannot understand why atheists don't buy into it. They don't buy into it because the system, the overarching systematic explanation from beginning to end, is absurd in the way it is being presented, in this case, YHWH causes suffering in order to heal it. What a great guy he must be, right? Wrong! Yet you don't see it, do you?
at Romans 8:20-22 wherein it acknowledges that it was God who subjected his human creation to futility and a groaning in pain together, but that he did so for a purpose namely, that his human creation will be set free from corruption and death and come to have the glorious freedom of the children of God. In other words, not needless.