There can be different reasons why a couple would want to file a divorce. The main problem could be from one side only or both but one thing is for sure: if they cannot agree to disagree and live peaceably with each other, and no one wants to give way, they will find the easy way out: divorce. It is not at all easy but to the couple it is probably easier than to live the rest of their lives with each other. It gets more difficult when there are children involved and their lives are surely affected. One of the parents could be hurting the children physically or verbally or it could be that the other half is suffering from the assaults. Other reasons could be adultery, drug abuse or alcoholism and again, the effects of such to the rest of the family.
When no solution is left but divorce, then there is nothing the couple can do but face it unless one gives in to the plea of the other for the hope of a better future with promises of repentance. Otherwise it is high time to get a really good lawyer like one of those divorce attorneys.