I just happened upon this thread, and found it interesting. I have recently been pondering an adjacent topic- namely how the Watchers of Genesis 6 came down and bred with human women to create the hybrid/defiled race of the Nephilim.
While it isn't biblical Canon (even though some church fathers advocated for it, and the Bible quotes it verbatum at least twice), the book of 1 Enoch goes into detail about how the "Watcher Angels" left heaven and defiled the human race by sleeping with their women- specifically how each (supposedly 200 in number) chose one wife for themselves:
1 Enoch 7:
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And all the others together with them took unto themselves wives, and each chose for himself one, and they began to go in unto them and to defile themselves with them, and they taught them charms
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and enchantments, and the cutting of roots, and made them acquainted with plants. And they
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became pregnant, and they bare great giants, whose height was three thousand ells: Who consumed
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all the acquisitions of men. And when men could no longer sustain them, the giants turned against
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them and devoured mankind. And they began to sin against birds, and beasts, and reptiles, and
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fish, and to devour one another's flesh, and drink the blood. Then the earth laid accusation against the lawless ones.
I absolutely do not side with the notion of monogamy itsself being evil, but it is interesting that 1 Enoch specifies this evil event (known by theologians as the second divine rebellion) as being based on a series of unholy
monogamous unions between angels and the daughters of men. I think this point is only really applicable in response to people's assumptions that polygamy only results in evil. With Genesis 3 also in mind, it's clear that the first two Divine rebellions actually came from monogamous relationships, even if not a direct result from monogamy itself. Just sayin.