Redwinestillfine
I don't think its vitriol against marriage and certainly not against making a commitment.
I think the issue is that marriage is less and less appropriate for people these days.
Its primary purpose in terms of society was for men to "secure" women for child-rearing and domestic labour purposes. Then over time it acquired a religious and moral veneer. Nowadays its primarily purpose is to protect women financially because their earning power tends to be diminished by having children.
With more and more women earning equal to if not more than their husbands, and with the religious element of marriage declining, I can see how it seems more out of step with the reality of many people's lives.
I still think in practical terms its a good insurance policy for any woman who is planning to take a break to have and bring up children.
But as someone who is financially independent and has a child it would not make any sense for me. My partner (who is not my child's father) earns less than me and has less in terms of assets. Marrying him would risk handing away my financial freedom and my child's inheritance. And as neither of us is religious there is no other reason to do it.
Overlay that with the frankly rather unpleasant symbolism of a traditional marriage (a woman being "given away" etc) and it all seems pretty jarring with modern life.
I think the way to look at it really is as a financial contract and insurance policy and if it works for you its a very sensible tool. But I think the reverence for it and its centrality to our moral life is out of step with most people's lives today.
Perhaps we need to reimagine marriage for our times.