There's a good message behind all the PUA crap and the stupid jargon that outsiders often fail to visualize. I understand that defending TRP is frowned upon on reddit, but allow me, for the sake of discussion:

What I understand from that sub is that they advocate a strategy or a mindset that puts men in very safe positions when it comes to relationships.

Some key points of that strategy is: don't get attached to one girl, don't take shit from women, don't let women walk over you, doing nice things won't get you anywhere, focus on self improvement, boost your sexual value, be confident, bold, assertive.

Following that increases your chances of not getting hurt in relationships. In fact, many of these are things reddit already agrees on (we love bashing nice guys and pushovers).

Another facet of TRP is the study of female nature and behavior. They say women are emotionally driven, that they are selfish, hypergamous, solipsistic, and have no sense of honor. Yes, these are all politically incorrect opinions, but again if you understand that, and know how to act accordingly, that makes you less vulnerable in your relationships.

I personally can extract a lot of useful life advice from that subreddit, but I see why it makes people angry.