When you hear "Lloth twisted" you could substitute "magically bioengineered" if that helps. Her goal was to turn an essentialist race of good/chaotic beings into lawful/evil ones, to do that she made physical changes that reinforce her desired behaviors.

Lloth linked unavoidable fetal Social Darwinism into physical pleasure for the future matriarchs of her new elven society. Lloth wanted a society that glorified the survival of the fittest above practically all else, and this was a means towards the end.

Yes, it's edgy cringe, but that's the point: this is a setting with objective capital-E Evil gods and Evil is fucking cringe.

(Also it was made by horny super dweebs)