We probably have much more agency than is usually supposed. And always have had, including in premortal life.
In premortal life there were many whose agency was not aligned with creation, who were opposed to creation. But as premortal spirits living in proximity to the divine, their behavior was good anyway. Like bad young children in a good home, they behaved pretty well despite themselves.
But in order to develop spiritually, they needed to incarnate, and then their innate badness came out as their agency became apparent.
Our capacity, and God's capacity, to influence the disposition of a bad person is less than often supposed. A person with a bad heart may be influenced to behave well, but the heart stays bad - unless there is change From Within.
The special evil of the Modern West may be due to the nature of the people incarnated. A high proportion of people with bad hearts. Most bad people just are that way, and always have been, from eternity.
They are hostile to creation, hostile to Gods hopes and plans, hostile to Love... Motivated be pride, resentment and spite. In general, they are self centred and hedonically motivated.
The root of this, is that basic materialism, reductionism, cynicism etc which is characteristic of Modern Man. Such shallow hedonism is innate, because premortal.
The only possible cure for such a deep rooted evil is to allow it to be very fully implemented, in its full insanity, incoherence, destruction and inversion. At the individual level and at the group level.
We are mostly hard cases.We are like the Alcoholics Anonymous who must reach rock bottom, by our own choices, before we can repent and be born-again.
That is what is going on here and now, and has been building for several generations. Our best and only collective hope, is to follow and experience the consequences of our evil natures - and to be denied any external help so that we can only be saved from an inner renewal.
We must change our own natures, must find our real selves, must be born again from the divine in each of us.
We are not being guided or cushioned from our own wicked natures by real churches or good social institutions. Instead they are corrupt and evil, and they encourage our own corruption and evil.
Nowadays we cannot merely exchange one form of external guidance for another. We cannot leave a bad job or atheism for a good job and a real church - because all jobs are/ tending evil and all churches are/ tending corrupting.
As innately wicked spirits, we have the chance to be born again in this mortal life, but only by this toughest of tough loves. And only by developing what God most wants us to develop, which is our own inner, divine, intuitive guidance and motivation.
These are the factors that account for the special aspects of our time. This is God's creation, and has been well designed; the Modern West is fit for purpose - and that purpose is to offer the best chance to some of the most intractably evil spirits ever seen.