I hate divorce too.
Over the years I've worked with numerous children. After working 13 years in the day-care business, I've seen a lot of marriages split. The effect on the kids is really bad.
Now, in a few instances, divorce just needed to happen. One such instance was that the father was a meth producer and kept the wife and kids in such terror. Their little girl used to come to the school, sit on the couch, put her thumb in her mouth and start to rhythmically slam her head against the back of the couch and would keep this up unless someone physically held her. For the health and safety of the kids, yes, divorce was necessary.
And, sadly, there were several divorces that happened because of unfaithfulness.
But, also sadly, a lot of the divorces were mainly because the husband and wife "didn't love each other anymore" or "we're better at being friends than being married" or "He just bores the (heck) out of me." Oftentimes the child-care giver becomes a confidant, and there were many times I sat in our pre-school office and listened to women (and a few times men) give the most selfish reasons for ripping their children's homes apart. One woman actually divorced her husband because they were both obese...she had surgery and lost a lot of weight, but her husband could not have the surgery for health reasons. After she lost weight, he was still fat. She divorced him because she said she was now sexy and wanted a sexier man to be with. Her husband was a great guy, he loved her dearly and loved his children dearly as well. She got custody though, and the kids spent the rest of the time I knew them visiting their loving father twice a month and living with mommy and the sexy man of the moment. She was on the sixth man when I moved away.
We would have to somehow hold the child's little world from spinning completely apart. There was not one, not even one child, who went through the divorce of their parents without having some serious discipline, eating, or social problems. Even when divorce was clearly the best option of a bad situation, the child still took a hit.
Again, I understand that divorce is sometimes necessary. I also understand that however much one partner is committed to making the marriage work, if the other partner doesn't want to stay married, there's not much that can be done about it.
But, divorce is never a "good" thing. I understand why God says He hates it.
Like almost everything else, no one can agree on the interpretation of scriptures, even though we all use the same ones. 
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