Very similar for me. After 22 years, we got married in 2022 and were struggling less than 50 days later. After a lot of heartache for all involved (apart from her it seems), me and my middle one are in our house on our own. The stress of organising Christmas Day was having an affect on all of us (apart from her it seems) and me and the eldest had words. As it transpired, they all went to hers for about 4 hours on Christmas morning and then spent the rest of the day with me. We had a fantastic day. We fucked off traditional Christmas dinner because only two of us eat it anyway and had pizzas, chicken nuggets and chips. Your (ex) missus sounds like a reasonable woman and I'm happy for you. Mine has turned into somebody I don't even recognise and regardless of the impact things have on the kids, she ploughs on and does whatever she wants.
My best present was spending time with them and seeing them actually relaxed after the year they've had and the pressure that has unnecessarily placed onto them.