I would say the biggest thing is increased pressure and acceptance by women that they must have a career and put off getting married and having kids or not have these things at all. With women making their own money and government programs that provide welfare in case they get pregnant or struggle, the value of men is diminished as women don't see the need in finding a successful man who can take care of them especially in their 20s like in the past. It doesn't help that this message is reinforced by older generations of women, schools, television, movies, etc. that continue to act as if women have been oppressed by men.
Men are increasingly becoming a commodity that is little different from the next man in the eyes of women. Then, many of these women then go on to choose men for relationships who are supportive of these non-traditional choices: not having kids or putting them off, not getting married, accept me for being fat, tons of tattoos, weird hair color or just not acting feminine, etc. In short, we have created societies where women no longer value the best that men can offer.
Men are increasingly becoming a commodity that is little different from the next man in the eyes of women. Then, many of these women then go on to choose men for relationships who are supportive of these non-traditional choices: not having kids or putting them off, not getting married, accept me for being fat, tons of tattoos, weird hair color or just not acting feminine, etc. In short, we have created societies where women no longer value the best that men can offer.