Even women after casual relationships don't want to do so with men beneath them economically and socially. They say 20% of the guys are having 80% of the sex. It's impossible to know exactly, but things do seem like they trend that way more than the other. It's why words like "incel" exist, and its ranks are predominantly male. It's why those "fedora neckbeards" and "nice guys" exist, complaining about the types of men women date instead of them. Mostly they just fail to live up to masculine gender roles, which women do still prefer, but of course some really have let bitterness and passive aggressiveness and antisocial hobbies become their nature. But they're not all bronies with waifu body pillows. Mostly, they're just not socially and economically desirable to women. Women are making great strides in the workplace, so they themselves are moving up socially and economically, which means if they want to continue dating "up", their pool of date worthy men becomes narrower. I've actually read a feminist writer for The Guardian or Salon or something like that complaining about that dwindling pool of decent men predicament, but of course she glossed over the solution that male gender roles probably needed to go too.

Other people mention the work life being part of the problem, with long hours and it being taboo to be the first person to clock out. That again falls back on male gender roles. Men who fail to get many second dates or even first dates try to make themselves more desirable by working harder, longer, affording their own place, and proving they can provide and be reliable. And without a doubt, it helps men improve their chances. But it's just one variable of being a desirable man, and it's not closing the gap.