Party Finder isn't 'garbage'; it really depends on how you set up your party requirements.
I set up my own parties practically every day on PF; I make sure to set a higher ilvl, 'duty complete', and in description I set other misc requirements (such as Tsukuyomi, I put "T = N, DPS = S, Healer = big boi side [E/W]") etc.

But, I constantly see folks never placing these requirements for a farm party...which is obviously going to form a rather questionable party.

But, overall, PF isn't the issue. It's very beneficial to have actually. It depends on PF settings you have placed, and the players themselves.