Referring to men as "alpha" and "beta" always makes me laugh. The terms are so nebulous it's pointless to use either. There's also a lot of nuance that's absent in the generalizations being made. I would posit that "negging" only works on women who are used to being overly complimented or sought after because chances are they normally receive tons of compliments, therefore it's counterintuitive to do the opposite and position yourself in a way that contrasts against those other guys and keeps you from looking like an ass kisser. However, that this works, is simply due to the novelty that is quickly fading as this "PUA culture" becomes saturated. It'll become easier for women to pick up on it and devalue someone socially who's trying what the other asshole did before him. Too much emphasis is put on "negging" as if it's the end-all of attraction. You don't have to do this to be attractive. However, you can be playful with how you word things and what you say. You can tell a girl you hate her while simultaneously giving her a quick hug or stating it in a specific tone. Like I stated earlier, just act like you would with your friends. None of this bullshit is necessary nor are pseudo-psychological "tricks" that any dude can learn. Maybe it helps those who are inexperienced and frustrated with their love lives as a framework of some sort, but ultimately, it's meaningless if you can't improve yourself and naturally learn how to conduct yourself in social situations. Essentially what a lot of "PUAs" teach is a pyramid scheme to get women into bed for the night. Sure, some will respond to it just like people fall for pyramid schemes, but it's still a morally shitty thing to do.
Another thing that's being overlooked is these tactics, by far, are most successful in bars and clubs where women are more likely to want to hook up or meet people. Again, it's less about a technique and more about knowing how to deal with different social situations and ridding yourself of outcome dependence, which in turn leads to confidence (which is attractive). A confident person isn't going to call a girl dozens of times after meeting up, nag her, beg her for sex, show neediness, jealousy or mistreat her/lie to her. A confident person doesn't need to be controlling. That a lot of these tactics work is more a symptom of society's emphasis on enforcing gender roles. Guys complain about women not taking initiative and being passive, but it's the very patriarchy they apparently want to uphold that has made it so.
Edit:
It's ridiculous that I have to state this, but all of this information is coming from a guy who has had a lot of experience reading up on and studying this topic, both online and in various venues. I'm pretty poor and have had no trouble being in long, fulfilling relationships with good, attractive, "socially dominant" women with high paying jobs. I certainly don't speak from lack of experience. I've seen how the "social hierarchy" functions and how warped it can be. I've spoken to tons of women about this subject and gotten a pretty good idea in that regard, too. I've even had jealous guys while out at restaurants openly attack me because I apparently didn't look "rich" enough to be out and about with an attractive woman and her equally attractive friends. It's ridiculous. I can see why some guys become bitter and turn to the PUA stuff, but unfortunately, there's a lot of bullshit out there and it's largely unnecessary.