There was a time when PUA was demonized. By a lot of the same men and women (especially women) tacitly praising it now. The issue is, a lot of these young guys grew up while PUA was being demonized. Some of them were around for when it was created as well. They got the message. However, they've also seen the shift. A lot of the same people who called PUA predators are now sounding like PUA. These same people are the ones telling these dudes to listen to them now. That's the problem a decent number of them have. Also, living in a society that simultaneously says a woman can do all that a man can do, a woman is equal to a man, where breaking gender barriers and going against gender norms is celebrated
yet still wants to claim that men are to do all kinds of hoops and tricks for p*ssy and a woman's entertainment (this is how a lot see it) is mind-numbing. Even more when the same people to buy into this seemingly raw deal will also call the very dudes they are trying to "help" incels, lie, and laugh and mock their predicament. It's a complete mess and no wonder they tune out these voices for their own lives. Add in that some are content, then you have the current state of affairs.
This is what I mean. You have to overcome all of this and come up with a new selling point since the old ones are essentially rubbish now.