The male loneliness epidemic is also known as the growth of incel circles and the influence of supposedly masculine influencers who will do literally anything but treat women both as equals and with respect. And the way these groups work is that they need to keep their membership up, so it's in their interest to keep you away from women by turning you against them.
Whatever narrative there is about young men being left behind by progressiveness, it is a big lie over a smaller truth (the system fails everyone and now it is sometimes failing young white men, in terms of education). Not so different to the great replacement theory I would imagine, but based on gender not race/religion.