I don't think it was really about Facebook's ethos at all, and I think people are going to continue writing about Facebook negatively until we all find some way to solve the problems they're causing.
It's not just going to go away because it's a dead horse. That's like saying that anti-war protesters should just stop showing up, "because, duh, we all know war is bad, so just put your little placard down, already."
That's not a fair comparison. A protester's purpose is simply to make it known that they are for/against a certain cause – to increment the number of visible proponents/opponents.
A blog post needs to do a lot more than that if it is to be deemed a success. Especially if it is quite long. It should bring some insight. @nkwiatek thinks this particular blog post didn't bring much insight. If this is true, then it's valid to use this as a criticism. A long blog post with a reflective tone implicitly promises to bring something more to the table than "I think X is wrong".
It's not just going to go away because it's a dead horse. That's like saying that anti-war protesters should just stop showing up, "because, duh, we all know war is bad, so just put your little placard down, already."