That kind of hate is almost definitely coming from other women. I’d say that from an evolutionary psychology perspective, it’s about them raising the bar for everyone by going the extra mile to look pretty.

There is a lot of suppositions going on. First, that there is actually a significant amount of ‘hate’ being expressed (see my other comment to the op). Then, that any of that cosmetic surgery actually ‘raises the bar’ (and make any woman look ‘prettier’) compared to, let’s call them non-surgically modified or ‘non-enhanced’ women. Then, that those ‘enhanced’ women are in anyway more successful in what they want to achieve compared to those other women. Finally that those other women feel in way threatened by that group. It could also be interesting to consider what we consider as cosmetic surgery (and not), how this has developed, and since what time.

In regard to the usefulness of cosmetic surgery as a way to mate/date (which I imagine is one of the main reasons why anyone would do it) I can only speak for myself, aka as an old dude that has been in a relationship for more than 20 years. But even when I was a lot younger, when I was a lot less focused on any single person in my life, I never dated a woman that had ‘raised’ the bar you mentioned. It was not what I was looking for in a woman. And I would be curious to get data on how many of those women manage to find a partner and then to keep it compared to the other women?

I had preferences but outside of those ‘couple nights fun times’, a lot more important to me than the look was (and would still be) an interesting personality, aka a woman with as much brains as possible. Brains could not and still can’t be surgically enhanced so, obviously, the kind of women I was seriously interested in were the ones willing to put it in the actual time and efforts to make their brains ‘look’ better ;)

Any other type of ‘enhancement’ to me looked like a serious waste of precious time, and resources.

Maybe I was completely wrong and maybe it’s just me being odd? Could very well be. I remember as a teen, I had a few pictures of girls on the walls of my room taken out of magazines. Most of them were not top models or actresses they were… female writers and artists I admired and they were pinned alongside (at least as many) male ones. I fantasized a lot more about meeting people like Virginia Woolf (Still one dream of mine, to this very day) and Jane Austen (or, say, my dear Flaubert and Tolstoy) than with any actress or top model… no matter how ‘perfect’ they (or their boobs) looked like in the magazines.