I'm 62 and I can tell you that the Christmas feast feels like a lot more work than it did when I was 25, 30,40, 50...this year only the 'grands' got stockings, and their wasn't too much in them.
Suggestion:
Send each of your children a letter that explains that, since you are now 80 years old, the preparation and clean up for the Christmas celebration are too much for you. (That includes shopping for the items to fill the boots!)
Tell them that you will be happy to teach them how to make the Christmas boots and have a recipe for the Christmas ham that you would be thrilled to pass on. Include both the recipe and the directions for the boots in your letter.
If no one steps up to take over the feast, I would invite them over for a pot luck dinner or just dessert. Use paper plates and utensils, and let them know that they will have to clean up after the meal.
If they continue to get 'all in your face', get right back into their faces and tell them you're tired of their temper tantrums when they don't get their way and send them to the corner. (LOL) And continue to say "NO, it tires me too much. I simply can't do the Christmas feast anymore."