It sounds to me like your group is not actually engaging with the social skill rules much. You may well be rolling Deception and Diplomacy checks and the like, and doing social encounters, but you aren't using the actual rules as presented.
Which, to be clear, is fine. But obviously social Skill Feats are gonna be underwhelming if you're ignoring the rules they're based on. That's...really not a problem with the game so much as a play style disconnect.
There might be something to this, because I remember thinking this when looking over the feats. That they just weren't going to feel useful in the game.
Is there a group like the people on Critical Role that plays PF2 where I could see some of this in full value?