So if Jesus came here to save us, why is are humans and the world in such a fucked up state?
Well at least you have " Some of the Why we need to be saved" understood; were messed up. God has built his case for Why we need him for sure. Left to ourselves, we would eventually destroy ourselves, because now we have the power to do it. The salvation of God is already a done deal, but only God can decide when it begins in earnest. But all humans will be with God in eternity , there is no such thing as " A lost human soul." That is a Christian myth.
For some reason, that I don't understand, God wanted us to be weak first; to be overcome by evil first; to experience sin and confusion first, and THEN be saved from it. I don't understand the pathology of God, but he wanted humans to be lost, only to then be found later.
I really can't figure it all out, its beyond me. But God is NOT leaving the salvation of mankind, up to mankind itself , God has taken that matter into his hands, and his only. He is not going to allow us to screw that up.