...how would this thing get fixed?
I think, if we would love as Jesus have taught, the problems would be solved. Reason for all problems is that people are led by fear, not by love. Fear is not good god, love is.
He who doesn't love doesn't know God, for God is love.
1 John 4:8
...Also, as a bonus question, what would the Antichrist do. ...
I think his goal is to make people worship him and be his slaves. And that can happen by intimidating and fear. I hope people don’t fear, because as Yoda says, “fear is the path to the dark side. Fear leads to anger. Anger leads to hate. Hate leads to suffering”.
That is why I want to say:
…fear not them which kill the body, but are not able to kill the soul: but rather fear him which is able to destroy both soul and body in hell…
Matt. 10:28
There is no fear in love; but perfect love casts out fear, because fear has punishment. He who fears is not made perfect in love.
1 John 4:18