I think the millenial generation, contrary to the popular belief that they got married at a later age than previous generations, were the most sex and love deprived and thus I feel like marriage for millenials was such a 2 way street

This could also explain why millenials are only good at their relationships with technology and media

For instance millenials had less sex than previous generations, but they also had the highest the amounts of breakups in human history

The STD rates for them were at an all time high

I think the other reason marriage isn't getting called out at all, even by the so called progressives, it is because it is the only institution were women still don't really have to do half of the work for anything(of course, add in porn, hook up culture and the convenience of free information on dating and relationships and see for yourself if marriage is as still useful)

Just my 2 cents