“But you said “all creation is under the curse”. Aren’t the righteous part of creation?”
Rom. 8:22-23, “For we know that the whole creation groaneth and travaileth in pain together until now. And not only they, but ourselves also, which have the firstfruits of the Spirit, even we ourselves groan within ourselves, waiting for the adoption, to wit, the redemption of our body.”
Notice the “And not only they, but ourselves also,”, the “but” is explained by Paul here:
Gal 3:13, “Christ hath redeemed us from the curse of the law, being made a curse for us: for it is written, Cursed [is] every one that hangeth on a tree:”
It’s a whole lot like Jesus said in John 17:15-16, “I pray not that thou shouldest take them out of the world, but that thou shouldest keep them from the evil. They are not of the world, even as I am not of the world.”
We were once under the curse but Jesus became the curse for us, however we still labor because of the curse of creation. He won’t take us out of that until His return. So to answer your oblique question, the creation and its systems can’t progressively get better because we are here since, by election, only those chosen from the foundation of the earth are pardoned from the judgment of the curse that came on all of creation when Adam sinned and that won’t be relieved until the firey renovation.
Amen.
The Millennial reign of Christ sees the removal of the curse from Nature.
A New Heavens and Earth are created after the final rebellion to remove the taint of it.