Not per se. In fact, maybe many kids are better off with one widowed parent than 2 parents who hate each other’s kishkes.
But, research does show that children raised by 2 parents who are stable and committed in their marriage do have better outcomes than those who don’t. A certain Lubavitch celebrity rabbi to the stars is often quoted as saying that “the best gift 2 parents can give their kids is to love each other.”
In my experience, just about everyone I’ve known from a broken home, or a situation where there was no shalom bayit, has turned out to be affected adversely or to have mental or emotional disturbances of some sort, whether it be a diagnosed illness, selfishness/narcissism, or other personality and character defects.