In the past, I have attempted a tongue-in-cheek explanation for why so many women who want to marry end up single and frustrated. Today I'm going to attempt to critique a much smaller subset of the problem, though one that I think is important for several reasons.
By basically ignoring passages in Scripture such as I Corinthians 7:1-9 and never developing a robust theology and practice of the consecrated single life, Protestantism condemns numerous women to either 1) a lifetime of seemingly purposeless singlehood/second class life compared to married people or 2) marrying men who are entirely unserious about their faith.
Throughout history the percentage of men who are serious about their faith has always been smaller than the percentage of women, especially after leaving the home. In the Catholic and Orthodox worlds, offering the option of becoming a nun to young women helps to balance the marriage market and increases the odds of young women finding a partner with whom they can be "equally yoked."
It is incredibly ironic to me that a subset of Christianity which has accepted contraception, in practice even the kind that sometimes stops implantation, has no visible representation of the consecrated single life which Scripture and the early church recommend so highly. I suppose though, it makes sense that a society which finds it unrealistic for married people to practice periodic abstinence would also have difficulty creating a vibrant culture where the unmarried could enjoy a meaningful, joyful sexless existence while feeling just as valued in their churches as their married comrades.
Anyway, that's my reaction to having been on both sides of the Protestant/Historic Christianity divide and hearing far more Protestant women complain bitterly about the lack of Godly men than Catholic/Orthodox. While the pain of not finding one's spouse/vocation can be visceral and real on both sides of the 16th century theological divide (especially in today's culture where many men are still living the life of an adolescent into their thirties), in my limited experience, it seems to run deeper and to be more common on the Protestant side of things... and the only (mainstream) answer seems to be "Don't Give Up on Marriage," which strikes me as entirely inadequate.