That one you can probably place the blame squarely on the conservatives for. That bias made some sense back in the old days when women couldn't possibly hope to get a job that paid anywhere near what her (now ex-)husband earned. But things are completely different now, but the court system is still stuck in the 1950s. Meanwhile, the men who complain about this bias continue to vote for conservatives.
Somehow, I don't think that there are many conservative judges in family courts. Family court judges heavily lean female and liberal.
Many "liberals" in America really aren't that liberal, and women in America generally lean conservative from what I've seen, despite their claims of being liberal. For instance, the number of single women attending church is much higher than the number of single men (find a single woman who identifies as active Christian and ask her if she has any luck finding single guys at church).
We've had a decade+ of men being told they're useless oppressors, who've earned nothing for themselves, whose "time is up", and that they haven't a place in the future. Couple that with the loss of shared identity in general, the breakdown of the family, the bias in the divorce process, the disappearance of purposeful work and more and it's no surprise that we're in the situation we're in now.
The ever-changing "ideals" and "values" we're building modern society on are as brittle as a house of cards.
A note: I'm a happily married man with a career I enjoy and am optimistic for my own future, so the above isn't coming from some sense of ingrained / developed resentment, merely observation.