Well, you're entitled to your opinion. I thought it was realistic. It says you have to try, but when your spouse just pretends to be committed, never really tries to make things work, isn't understanding - well, why sell your soul to that? Why sacrifice yourself? You shouldn't. You should focus on yourself and be happy. And if that inspires your spouse to re-evaluate, to recommit, to become interested in trying again, great! But that isn't the norm.
The point is to not lose yourself in pursuing an estranged spouse. You're worth more than that.