Many (not all) western countries offer 'no fault' divorce, so it is easier to get divorced than to stay married. Sometimes it's
better, too (e.g., in cases of physical, sexual, and other types of abuse), but obviously if no fault divorce weren't a thing, we would probably see the number of divorces drop steeply...and maybe the number of extramarital affairs rise to an even higher number than the already unacceptable number that there are in western societies.
Too many people have a secular attitude where finding a partner is like buying a car or something: try it out for a while, if it doesn't meet your expectations, trade it in for something else. Repeat over and over until you're out of 'credit' at the dealership (read: too old, too fat, too whatever to attract a better quality mate than the one/s you earlier traded in, without a serious cash rebate involved to make up the difference -- hence the phenomenon of gross old men marrying young women). Both men and women do this, so I don't think it's a "women problem", as another poster put it, though it may manifest itself slightly differently between the sexes due to the different overall trajectory of average men and womens' lives, since women have a much clearer expiration date on their social and physical capital that is tied to their biological clock, whereas a man can be old and gross and be making more money than he ever did when he was young and attractive. It all sounds quite harsh (because it is), but this is the reality of what dating is in a secular world, and Christians just like non-Christians find themselves in such a world. (And even in the Christian world, it's not like people are magically bereft of these same instincts: I didn't get a wife when I came into the Orthodox Church, and I'm not exactly waiting around for someone to bring me one, either; Egyptians aren't
stupid, just loud, so we work just fine not being together
).