Just because other people have been jackasses does not give you an excuse to be a jackass. I've seen plenty of divorces that ended quite happily because both people were civil to each other. You just don't hear about those because they don't usually make much noise.

But even if you believe that it does justify it, however misguided that is, since when does a divorce ever justify screwing over your children in addition to your spouse? At that point, it's just pure greed.