I’m pretty sure that everything we experience contributes to the person we become, good and bad. Sometimes, obviously, the products of divorce might be less damaging than the effects of an unhappy marriage.
That said, even in a divorce that doesn’t appear contentious, there may be many subtle factors which contribute to the anxiety or stress of the child(ren). Most children wish for their family to be re-united. Most miss the more constant association with the parent who leaves. Those who are very young when the divorce happens are obviously less affected by a sense of loss, except that they may wonder what they lost, and that can be very disturbing too.
One such example is my son’s divorce, in which his former wife spoke very negatively and said untrue things about him and his behaviors in front of the children. He chose not to tell the children the (extremely damaging) things she had done which had initiated his decision to leave, so the children have felt some bitterness and sense of abandonment towards him. He just bites it, and keeps showing them unconditional love and support, and they seem to adjust with time, but not without pain.
He is a very loving and involved father, perhaps unusually so, and his daughters adore him, but there have been great issues for him to overcome. He is by far the more affectionate, attentive and loving parent, and the children figure that out for themselves, but then tend to wish that he was the primary caregiver. In fact he has taken that role with one of the children when her mother threw her out. Not that he’s too permissive, in fact their mother is very concerned about her own social life, and discipline and concern for their welfare runs a distant second to what’s on her mind.
She will be marrying someone who lives a day’s drive away from their present home and moving two of the children away from their father next month. This has been a great source of pain to dad and the girls.
Also, the two parents have very differing parenting styles, which in some cases have devolved into disputes which haven’t escaped the attention of the children. They have suffered, and these things have definitely affected their personalities and their behavior.
Certainly , many parents are able to put the needs of their children ahead of their own in their after-divorce relationships, and I guess that’s about the best they can do. I don’t think there is an ideal situation where the parents of children are not able to continue a marriage/relationship. But hopefully these challenges can help them to develop good coping skills and make the children better able to deal with other difficult things which inevitably come into their lives.