I think you need to do a lot more research.

I'm providing quotes and a source, you just blindly said "this is a fact". What research have you done that you can provide as backup to your claims?

According to the surveys, married women reported they were less satisfied with the quality of their relationships than married men were. In contrast, women and men in nonmarital relationships reported similar levels of relationship quality, Rosenfeld found. It's possible that women report lower levels because they experience heterosexual marriage as constraining, oppressive, uncomfortable and controlling, Rosenfeld said. Researchers have examined the unequal power dynamic present in many American heterosexual marriages. For instance, American women are usually younger than their husbands, earn less money and often take their husband's last name, Rosenfeld said. [The Science of Breakups: 7 Facts About Splitsville] The book "The Changing Rhythms of AmericanFamily Life" (Russell Sage Foundation, 2006) found that, although married fathers increased child care time between 1965 and 2000, married mothers still spent more time overall on family caregiving(41 hours per week for mothers versus 22 hours per week for fathers), Rosenfeld said in the study. Wives also cook and clean an average of 10 hours more per week than husbands do, he said. In the 1980s, men did substantially less houseworkthan their wives, according to a 2003 study published in the Journal of Family Issues. That study found that "marriages in which the wife felt they were doing more than their share of the housework were especially likely to end in divorce," Rosenfeld wrote in the new study.

"I think that marriage as an institution has been a little bit slow to catch up with expectations for gender equality," Rosenfeld said. "On the other hand, I think that nonmarital relationships lack the historical baggage and expectations of marriage, which makes the nonmarital relationships more flexible, and therefore more adaptable to modern expectations, including women's expectations for more gender equality."

“The expectation is that marriage has a whole bunch of benefits and positive characteristics for women that it didn’t have in the past, but the truth is much trickier than that,” Rosenfeld said. Though he stressed that most women surveyed were happy with their marriages, many of those who weren’t cited controlling husbands and a loss of independence as causes of discontent. He also speculated that, although most men today espouse egalitarian values, many probably still harbor subconscious expectations of a wife’s traditional role in the household. This could explain why, after all these years, women still shoulder twice as many domestic responsibilities as men. (In contrast, studies have shown that couples who equally divide their child-care duties have better sex lives.)