The parents in Marriage Story tried. And when the mom is unable to read the things she loves about her husband, we see her hot flash of realization as she leaves the mediation without engaging in the process.
I took the idea of a collaborative divorce to heart. But in the end there was no collaboration. I lost all my issues. All that "collaborative" meant was that I wasn't going to sue my soon-to-be-ex during the negotiations of our divorce.