It seems that the ultimate desire of "evil" is that Men should desire their own annihilation.
In "Medieval" times, the main conceptual understanding of "what Satan wants" was to rule a kind of parallel-but-evil world; broadly of the kind more depicted in Dante's Inferno or CS Lewis's The Screwtape Letters. Instead of God there is Satan; instead of angels, there are demons; instead of a divine hierarchy, there is a "lowerarchy"; instead of the happy resurrected, there are souls-in-torment etc.
But such a Hell retains much of God's creation about it: there is form, structure, order, obedience, diligence etc - therefore such a Hell has potentially a long way to go in increasing its evil.
It is possible to look at the "Medieval Hell" as a consequence of what damned souls desired for themselves at that time. People then still wanted eternal life - but not a life in Heaven, instead they wanted to continue to indulge their favoured lusts and sadisms; which, presumably, is why depictions of Hell showed different fates for different types or classes of unrepentant sinner.
Perhaps for similar reasons; Christian Medieval Man saw both Heaven and Hell as having broadly the same characteristics as the societies he dwelt-in: ruled by a Monarch and the Catholic Church (each similarly organized) - whether Eastern or Western Catholic ("Throne and Altar", as more recent Roman Catholics call it).
What I am suggesting here is that the sameness between "real life" and the pictures of Heaven and Hell was derived from Man's consciousness; from what Men understood and wanted.
But Modern Man's understanding and desires are very different from Medieval Man. In particular, Modern Man desires that his death be a complete annihilation - such that nothing be left of body or soul.
Indeed, Modern Man does not believe that there is any such a thing as a soul - in principle separable from the body; but instead he believes that there is a mind, which is merely an abstraction of ongoing observable brain functioning - and such an 'epiphenomenal' mind must therefore cease with bodily death and dissolution.
Such matters are usually regarded the other way around than I have stated here; with expectation (if not desire) as a consequence of what Men believe. But I am saying instead that belief is a consequence of what Men want.
I am saying that the ultimate reason that Modern Men do not believe in life beyond death, is that Men do not want life after death: Modern Men instead want annihilation at death.
I am saying that in this situation; desire causes belief, not the other way around.
If we assume that desire causes belief, and belief causes Men's values; and if Men's values cause Men's behaviour; then we may infer that the fundamental nature of Modern Society is ultimately a consequence of Modern Men's desires.
To put it the other way around: Men's desires shapes society - via Men's values.
Therefore - given that Modern Men desire annihilation, it should not be surprising that Modern Society seeks its own annihilation; nor should it be surprising that this operates via increasingly-explicit value-inversion.
What is truly astonishing about Modern Society (especially in the West, and where Western values dominate) - and what is apparently unprecedented in world history - is that the fundamentals of human biological life have become officially and systematically denied, destroyed, and inverted.
Something as biologically natural and spontaneous as eating and drinking are under continual assault, top-down; to dissociate them from anything natural, to delete whatever is instinctive, to reshape and invert preferences. We often get 'idealistic' depictions of a future in which grossly unnatural and distorted foods and drinks are regarded as progress: in which such a situation is regarded as moral progress.
(The globalist totalitarian support and incentives for 'veganism' is a mainstream example; its morphing into propaganda for Westerners eating/ subsisting-on artificial-meat and factory-processed insects/ grubs, is a further inversion.)
Something as biologically natural and spontaneous as sex and reproduction have, of course, long since been atomized into components, and inverted.
Sex is now dissociated from reproduction; both natural sex and reproduction are regarded negatively and it has become illegal, punishable to advocate them.
Whatever is non-biological and sterile is aggrandized, propagandized, subsidized - de facto mandatory in particular circles.
Something as biologically natural and spontaneous as family, is likewise subjected to inversion following decades of successful destruction. Natural and biological family is increasingly depicted as innately evil, oppressive, exploitative; and "anything-else" is deliberately (with upfront financial and status rewards) mass-presented in idealized ways, with an inbuilt assumption of their superiority.
I regard these mainstream, official, totalitarian-imposed social-aspects of Modern Life; as distal consequences of the proximate desire for self-annihilation that characterizes Modern Man.
Put differently: the ultimate cause of the inverted values which are destroying Western Society (and probably, to some large extent, the whole world) - is the positive wish of so many individual Western Men to be utterly annihilated (body and mind/ soul/ spirit) when they die.
Because... When so many people desire their own self-annihilation, of course society will come to reflect and to fulfill those desires!