I'm a bit of a Grinch too. Fortunately, my family are not into Christmas like most of the population appear to be so I don't have to faf around with gifts and shopping and big meals. I make one thing (a pie) and give one gift (an under $10 secret santa).
I had a stint of a couple of years where I really got into Christmas. But then my ex's sisters decided to have emotional breakdowns and "you hurt me when you divorced" tantrums in the middle of my Christmas lunch and got pissy when I cracked a joke (that, in the moment, absolutely had to be cracked). NEVER AGAIN.