The Problem with PUA Advice is a good short series by blogger Advocatus Diaboli explaining how many of the teachings of PUA are logical-sounding but based on false premises. One of the main myths he tackles is this idea that women are a mystery sauce, and that you have to work hard on "self-improvement" to get them. This myth keeps getting proliferated by both mainstream "dating advice" people and PUAs. In reality, as long as you have a decent getup and aren't slovenly looking, flirting will get you decent results, but you have to flirt a lot. AD describes this as "putting in 23 hours of work for every hour of pussy you get."
AD believes this labor-intensive process is not necessary, or at least should not be relied on exclusively. His solution? If you have a middle-class income, you can consistently get better-looking girls for a lot less effort by simply paying for sex. It doesn't have to be that much, either- you can get creative with it, and AD has written a lot on just how you can do that.
PUAs seem to be obsessed with getting "free" women, but they are investing large amounts of time for fleeting pussy. It strikes me as a scam where men have to put in huge amounts of effort, and women get to pick and choose. AD's alternative sounds much better.
The Problem with PUA Advice Parts 1, 2, 3, 4, 5, and 6.