People feel they have to make a big deal of it, rather than do what suits them, and they make it really stressful for themselves.
My mother was a total Christmas martyr, meal was essentially cooked the day before and reheated, when it was just a roast and veg for 5. I get it's hard if you have 20 coming and don't like to cook, but how many people do that scale now?
I've gone through phases of making Christmas lunch for 5, for just me, and now for 2. When there's kids it's magical, but with 2 adults it's now a roast chicken and bought fancy dessert.
With presents, again it's a big deal for kids, but what adults are really bothered? If you don't enjoy getting just the right present for everyone, do a theme - books, pjs or hat, scarf and gloves for every adult.
My mother made Christmas so stressy, it was supposed to be perfect, i just want it to fun for kids and relaxing for adults.