Well, the article's not really saying anything new, and it's quite right about many things.
I do think, though, that the writer seems to blame patriarchy for men's loneliness, and I have to disagree with that.
Patriarchy doesn't preclude 'emotionally sustaining friendships with other men'. Patriarchy has existed practically since the beginning of history across most cultures, with women being oppressed and considered the property of men/lesser citizens, and it has frequently been the norm for men to have close, emotionally supportive relationships with other men across time and culture, regardless of that.
The current cultural norms in the west do seem to encourage men to emotionally isolate themselves, but that's not innate to 'patriarchy'.
(Obviously, patriarchy is very bad, just to be clear.)