If the parents are always degrading each other or being outright hateful and rude to the other parent, the child will grow up thinking that this is how a marriage is supposed to work.
A lot of women claim that they are being abused, even when there is no evidence of this, because it is easier to walk out on a marriage rather than fighting for it.
Children are smart and tend to blame themselves when the parents divorce even though children are very rarely the cause of marital discourse.
I believe that you married your spouse because you loved them at one point in time. Why wouldn't you try and save the marriage and then you wouldn't have to have a broken marriage?