How did we get in this situation?
As a nation, we walked away from God. So why should not expect God to walk away from us and let go our own ways and experience the fruits of our sin?
Biblically, it's a condition known as 'The Wrath Of God'. It is the principle of God leaving those who walk away from Him to "do it themselves" without Him and suffer chastisement here on earth as a result of their own wickedness. Maybe, perhaps maybe, they will see the error of their ways and repent and turn to Him? If they don't, it gets worse until it leads to a final destruction.
Go check out the Supreme Court decisions in the early '60s when we as a nation turned on God and threw Him out of the public square and the public schools. It has been pretty much a national downhill slide since then with a brief interregnum during the Reagan years.