If your kids are old enough, talk to them about how they would like to do Christmas within the schedule you and the other parent have determined. Over time, it does get better. But while things are fresh and hard, make sure you take care of yourself first.
So she's mad. She got what she wanted and she's still mad. Oh, and I'm still writing. I guess that's the hot poker that is still painfully inserted and irremovable.
I'll stay out of her business and assessing her state of mind. But there's a good bit of the story that is left out when I take this repose about my divorce. It was a good thing given the toxic circumstances of my crumbling marriage. So in that respect, yes, she did us all a favor. But let's dig a bit deeper to see where things went foul.
The trick in keeping your relationship vibrant and healthy, is to micro correct towards each other, towards the join between you. By showing your partner you are willing to own and handle the little issues that come up during the course of a week, you are giving them assurances that you can do the same over the longer trajectory of your relationship.
What I would like to propose is: give your body and soul what it needs/craves. Try and make healthier choices if you decide a meal or snack is in your best interest. And then, let it go, move on. Keep going. Do a bit more, eat a bit healthier, sleep a bit more, play a lot more, and listen to what your soul and body tell you.
There are plenty of times when it's difficult not being with my kids. But what I can give them is 110% dad when they are with me. I have the rest of the time, when they are not with me, to heal and focus on myself and my goals.
My ex-wife knows I am paying and will continue to pay my child support until my daughter turns 18. She wants to keep me under the thumb of the "enforcement" of Title IV-D because hurting me gives her pleasure.