I haven't even clicked the link but I expect all of your observations are right on point Don. You've already cited examples but I am sure there will be lots more. The only thing that would be surprising would be for those observations NOT to be true:
(1) The sacrifice of Iphegenia -- There you have it right off the bat - Stoicism is immersed in religion and/or virtue-ethics and everything takes second place to that. They choose their god - either divine (religion) or human (which trades under humanism) and EVERYTHING is made subsidiary to that goal. Well for the sake of consistency that is what they should do - choose their priority - but they choose things that Epicurus taught are simple mental inventions of mankind, rather than the faculties nature gave us. It would be hard to find a better way of focusing on the extreme and irreconcilable differences between Stoics and Epicurus, because to give up their false gods would be the end of stoicism. My god, they are almost "Christian" in their focus on sacrifice and pain as what they see as the meaning of life.
(2) Yes I observe the same embrace by the manosphere. Being one myself (a man) I don't have a problem with men having an understanding of the differences between the sexes, but I do (as for myself) insist that it be based on biology, on nature, on "the truth" - and not on invented gods and humanistic *virtue* ideals that have no foundation but arbitrary assertion. A truly effective "men's club" in the modern world would be an "Epicurean Men's Club" and I would have no more problem with that than I would with an "Epicurean Women's Club" or whatever other self-identified group thought it would be helpful to have a group devoted to their own unique circumstances of living -- "Epicurean Eskimos" etc!
(3) As to the split-personality aspect, yes there too. The majority of the moderns are focusing on cognitive behavioral therapy and similar psychological issues and they have a real schism from those who (rightly) seek consistency with the ancient Stoics. You can almost bet your life that early in their discussions the name "Martha Nussbaum" comes up, and "stoicism as therapy" is basically all they want to talk about. They seem to think that one can be happy simply by willing away the existence of pain, and not only is that wrong, but they really play games with the the definition of "happiness" because what most of the leaders mean is "meaningfulness" which for them is only a skip and a jump away from "virtue" -- and of course where they find "virtue" is in their own mix of social and political aphorisms. I would argue that Stoicism was - and is - an essentially political movement. Which is all to the good if you happen to share their "political" interpretation of life, but not very helpful (for YOU) if you don't happen to agree with them.