Researching marital effects on happiness is tricky because happier people are generally more likely to get married than others.
Still, statistics suggest that the chance of a marriage being happy are no better than 50 percent.
Women, research finds, have a lower chance of finding a partner to love than men. But they’re also more satisfied with living as a single person.
https://www.psychologytoday.com/us/blog/the-philosophers-diaries/202105/is-marriage-bad-deal-women