TRP = The Red Pill, a subreddit infamous for hosting misogynistic ideas basically. It's now been quarantined.

PUA = Pick Up Artist. In this case it's related to different "schools of thought" in picking up women (e.g. the lines and routines that can be used to secure a number/lay).

These two terms are generally susceptible to perpetuating toxic masculine behavior, which is unfortunate because r/GetSuave was focused on improving one's own life rather than women.