PG himself not only acknowledges that quality has declined but also that he has no idea how to reverse it. I don't know if I can effect change here, but I do know how it is done and I have done it elsewhere. Raising the bar on treating other members with respect and tolerating a diversity of viewpoints is part of how that is done.
You are, of course, free to make fun of me while bemoaning the decline in quality. I am free to think you are clearly clueless if you cannot see a connection between the two things.
PG himself has acknowledged the degrading quality. Thankfully some work has been done to curb this trend, but it does seem somewhat unavoidable as a community grows.