I do think my ex-wife and I could've agreed to 50/50 parenting and gotten a judge to sign off on our agreement. But she would never have given up her legal/strategic advantage. Perhaps she was doing what she thought was best for the children. Perhaps. But I think she was more self-centered than that, she was doing what she wanted, regardless of the impact on the kids.
Love your kids with everything you've got. Let go of your ex, as best you can, and focus on the impact your love is having on your kids. Stay true to that value and you will always choose the high road.