Can you get him a baby tree for his room or somewhere else in the house that is all his to decorate? Or some of those gummy snowman/ santa transfers to put on the windows? (warning- we got these out of the pound shop and if they fall off the glass with condensation they WILL stain your wooden sills.)
We are completely sporadic (haphazard and disorganised) in all that we do which I often worry creates massive disorder and chaos in our son’s life- on the plus side however it means he has low expectations of things happening to a pattern. Is it really a tradition that has set a huge expectation- do you think R is really going to notice and take it badly? If so then I would dress it up as a fantastic SURPRISE- the xmas elves came while you were sleeping, look how wonderful it is, kind of thing (rather than some grown ups decided to get their own way over his.) It might also reset his expectations. Children always surprise me with their resilience at things that would massively upset me as an alleged grownup (and conversely, their ability to do glass-shattering crying at something as benign as a bit of toast where the crust has fallen off a bit.)
Hope he’s ok in the morning, and I’m sorry that this is adding to your feeling of being marginalised in the place you live. xxx