The U.S. leads the world in the percentage of children raised in single parent families: https://www.pewresearch.org/fact-tank/2019/12/12/u-s-childre.... Over 30% of kids don't live with both parents. There are a raft of statistically established negative consequences arising from the absence of both parents, ranging from trouble at school to criminal conduct, to obesity and depression: https://www.mnpsych.org/index.php%3Foption%3Dcom_dailyplanet....
(As to “bias against Americans.” On the issues of marriage and family, a lot of the things that are “normal” in America are deemed at best highly regrettable where I’m from. Now I’m as much of a flag waver as the next immigrant. But in this particular area I’m not convinced that Americans are on the right track.)
American crime rates went down considerably. So did juvenile violence rates, drug taking and alcoholism. And teenage pregnancies went down too. All the while divorces went up. Stop demonizing kids of single parents and for that matter Americans.
Also, American domestic violence rates went down. While the reporting of it went up as women can get actual help nowdays, so there is a point in doing it. These would not even count as crimes in many of "harmonious" families with taboo around divorce.
Also, in Americans crime statistics, murders are higher relative to other crimes, because of prevalence of guns. America is not perfect, but it's youth is way better then you make them be due to your strong bias against kids who had divorced parents.