Is every woman shallow, lazy, entitled, manipulating and so on, or is that just generally the case and you don't want to waste your time sifting through the trash?

Yes.

Is it a recent thing that our society has brought out in women, or do you think that women are hard-wired to behave that way and our current society just facilitates it?

Yes.

Do you think that men who believe they are in happy monogamous relationships with women are misguided/lying to themselves, or that the relationship is doomed to turn into a parasitic one further down the line?

Yes.

Okay, here's the non-asshole responses: No, not every woman who has ever walked this Earth is a shallow, lazy, entitled, manipulative piece of shit. But enough of them are that finding the ones who aren't isn't worth the time and effort. Get what you want from them, and when they revert to type, cut them loose. If you want nothing from them, don't deal with them at all.

Is it a recent thing? The scary thing is that it isn't. Our male predecessors noted similar behaviors in their contemporary females. One that immediately springs to mind is the women of Rome storming the Senate and holding the Senators hostage until they ban on sale of luxury goods to females was lifted (Lex Oppia). Another example from Rome was the Lex Papia Poppaea, a slate of morality laws passed by Augustus that penalized bachelorhood and rewarded marriage and breeding because the women had grown so "independent" and intolerable by that point that men were refusing to marry.

I think people in general, but women in particular, are only as "monogamous" as the law and society require them to be. A relationship with a woman will only turn as parasitic as a man allows it to. Women will occasionally test their boundaries (nagging, crying, mockery, threats, etc.) in the relationship and the man has to reassert his boundaries or let her get away with it.