I think this is a terrific film, and this is a fine analysis. It makes strong points amid the genre framework, without (in my opinion) coming off as preachy. And yes, it isn't exactly flattering of men, but that's what makes it such a compelling story. I don't think it needed to take great strides into #notallmen territory as that isn't what the film is about. I think the focus and power of the film would be diluted if it did (despite the exceptions I mentioned in my earlier comment).
I understand why this film could make some men feel uncomfortable, but I don't think that's a bad thing necessarily. Yes, it isn't fun to be constantly villified simply for being male in ill-informed foaming-at-the-mouth polemics (I ignore such things with extreme prejudice), but this isn't one. This is a thought provoking work of art, and that's very different.