This isn't even #notall, though. It's #notmost, by a large margin.
Granted, righty men are sh-tbirds. I fully support women not dating, marrying, or procreating with them, it helps improve the species. But the fact that they are walking garbage does not reflect on men with a brain.
The criticism of #notall is it denies responsibility for speaking up against predatory men when they do their vile acting out among all men. That's valid. But we do speak out, vociferously, when these jackwagons mount their Gilead pulpits and start going on about women's "proper" place.
Blanket criticism of men or straights or whites is lazy, even if it is rewarded. Worse, it's bad strategy, because it makes the accuser look like a ninny.