One need not accept two Gods to despise this life - mainstream Christian teaching is quite sufficient. This life is a test or trial after which comes the "real" life
A thought experiment: is abortion evil? Sure, infanticide destroys a perfectly innocent life, but that perfectly innocent life is immediately sent to eternal paradise. So on what basis can you condemn it? Only that it violates God's law (or on some sort of pagan or secular grounds)
As to all of us being intrinsically evil, that too is completely orthodox- we have inherited the origin sin of Adam & "all have sinned and fallen short of the glory of God" Romans 3:23 (but this conflicts with the doctrine of childhood innocence just mentioned...)
The glorification of chastity is simply historical fact - St Margaret Mary was canonized in part for taking a vow of chastity as a small child
Flourishing means an embrace of this life for its own sake, embracing reason & observation, to "be fruitful and multiply" Genesis 1:28 (hey, not every line of scripture has to be rejected
The idea of humans as "stewards" of nature I particularly object to. This conception of middle creation I find quite alienating, placing man "above" and thus apart from nature but below and thus apart from God(s).
I think a healthier conception comingles man with both - God is Nature and so am I.
True power is not over the minds of men, but over Nature - producing a seeming paradox in which I both worship Reality and seek to control it. Resolution: Nature, to be commanded, must be obeyed. (Sir Francis Bacon)