Not really that sweeping, but specifically gps/parents of adult children who talk crap about how wonderful they were at parenting and how the current generation is failing. Recent examples:
-'my grandson is afraid of dogs, I would never have allowed that. All my children liked animals'
-'my gcs are five and can't swim, my dil just doesn't do much with them'
-'I saw a child watching a cartoon on an iPad while the parents chatted and ate dinner in the restaurant, it's lazy parenting, I bet the parents were really pleased when iPads were invented as it meant they could ignore their children'
Perhaps it's just my parents/pil and other gps I know who do this, I can't believe they were all perfect parents though, much as they think they were and throw stones now...