What if it takes more than polishing? You mentioned you were tired of certain threads
However these threads are rarely talking about polishing. They are generally talking about systemic problems. Those are the kind of problems that cause the GM to have to rewrite a system rather than polish the edges on a system they bought. That prompts the players (including the GM) to criticize the publishers for the poor game design.
Sure, but please expect the players (including the DM) to criticize the publishers for systemic problems. The DM bought the game so they would not have to write the system themselves. So if something needs more than polishing (5E skill system discouraging participation in the social pillar for example) then perhaps threads voicing that criticism are acceptable and expected?
In summary, I hear you are not trying to excuse publishers, but it does sound like you are tired of criticism of the publishers. That might be a communication issue. Maybe it only sounds like you are casting your net that wide.