Is there some way to communicate with the moderators of math.stackexchange.com when it's not about some particular posting, but rather about their policies and their behavior that persist over a decade or more that evince policies that are not stated in words?
You can't do this via flags. Flags are for matters involving particular postings and if you try to use the for the purpose describe above they'll spit in your face. They won't respond with something that says in words "Flags are not for that purpose." They'll just shove you aside and tell you you're garbage.
After several years of contacting them dozens of times about such a matter without getting any response at all, I told the moderators that I deduce from their years of silence that they deal ONLY with matters each of which involves ONE particular posting, but I thought they should have responded to my many many attempts to communicate with them by saying that they deal ONLY with matters each of which involves ONE particular posting, or at least responded in at least one of those many instances by saying something rather than by just ignoring me. This was in about 2015, after I had accumulated a reputation of over 100,000 and I have never seen the slightest sign that they received that missive from me, although I have reminded them of it several times. Then I wrote to the company via the contact form and asked what to do with concerns that exceed what the moderators can deal with, and they wrote back to say that I should submit such concerns to the company via the contact form. So I did so, in about 2015. I have yet to receive a reply. I reminded them of this by postal mail—the old-fashioned kind—in 2018, and I have received no acknowledgement that that they got this. That same document was sent to most of the officers of the company by email at the same time and not one has acknowledged receiving it.
So my question is: Is there some way to communicate with the moderators of math.stackexchange.com when it's not about some ONE particular posting?