In the USA, Priority Pass memberships are bundled with a credit card. The card issuer provides a single paragraph touting the benefit in glowing terms, but if you are not satisfied the card issuer sends you to Priority Pass.
This isn't unique to lounge access, it happens with a host of outsourced benefits. It won't change unless we hold the card issuer responsible.
Sure, you can complain to your card issuer if you don't find the benefits competitive.
But what is the point of complaining to PP about lack of lounges? They are an intermediary that sells excess capacity at third-party lounges. They can't just demand that a lounge (restaurant, etc) join the program. Complaining to PP about the lack of lounges at a particular airport is analogous to complaining to Expedia because there weren't any hotel rooms available in a particular city.