You need to grieve the loss of the dream birth, feel the difficulties of having your c-section. All of it, the pain was real, the distress was real.
BUT, let's not pretend that childbirth, the majority of the time, isn't a horribly painful process that kills women and children.
I used to say to myself that Mother Nature was a bitch who didn't care about individuals, she only cared about the species as a whole. If 10% of women would die in natural childbirth the species would still survive. I would have been one of the 10% if I didn't have medical interventions.
In the end, the biggest thing that brought me peace was the acceptance of the fact that it was ok to hate being pregnant, it was okay to hate the process of childbirth. It was necessary for me to have my wonderful sons who have brought me so much joy, and have given me a reason to fight through difficult times.
Having children isn't about a wonderful birthing process, it is about having children. You have your children now. It is ok to hate the childbirth you went through. Now you get to love the children you have.
(I would still have to be stopped from strangling the midwife who tried to prevent medical intervention by the specialists because she hated them, and caused me so much unnecessary suffering. Accepting isn't the same as forgiving....)