There are plenty of stories in the Bible where people move from a past in slavery, exile or sin into a future of freedom, returning home, or salvation. Christianity is pretty big on Hope.
The world degrades from the garden of Eden towards more chaos and finally the reign of Antichrist.
Only after that Christ emerges again, completely transforms Earth for a short while, and abolishes it altogether; the world ends.
I think you are missing a key moment, Christ being born. Christ’s life is the greatest moment in creation.
But Christ is born because the world needs saving. and the world keeps degrading after Christ ascends (returns, in a sense) to heaven. Prophetic activity ceases, miracles become more and more rare, etc.
After Christ, the world still tumbles towards hell, but now it has a hope to not completely end up there.