If you're screaming and fighting in front of your kids all the time.. Yeah, divorce is far better for them.
Even if you don't scream and fight directly in front of them, they can sense the discomfort in the air. There definitely hits a point where the pain of divorce isn't as strong as the pain of an unhappy home.
if the relationship between the parents is negative, divorce would probably be best for the childs well being. its very difficult to hide problems, and the stress effects the highly observent child. my daughter is almost 2 and she hasnt been bothered by my husband and i being separated for about 3 months. before, i noticed the stress was really getting to her. and my husband would even treat her poorly after an argument with me. this has been nothing but good for all three of us. my daughter gets to see her dad often, but shes otherwise indifferent about it.