To Hope for Better at Christmas

[DBD1975]

Just my DH and myself, I have always been involved with my DS and her family. I have been generous and supportive to them over the years and we have always spent Christmas day together.
My DS has needed a lot of support over the years and I have always tried my best to help financially, emotionally and physically.
This year they totally excluded us at Christmas due to some very complicated family dynamics. Our lives have not been easy but I always thought we would be there for one another.
This year I have realised this is not the case and my DS really doesn't like me very much.
It is a very sad place to be, I feel broken, and I am not sure how to move forward or come to terms with the situation.
I don't know if I am being unreasonable to have hoped to have been included at some point over Christmas (not necessarily Christmas day).

YANBU - Christmas is a time for family and to put any differences aside.
YABU - Just because you have always spent time together at Christmas it doesn't mean your DS should have included you this year.

There seems to be a huge backstory here, but regardless of it , YANBU to be hurt and consider what it means for your relationship going forward. Can you move on from this? Do you want to?

It's very hard to say without knowing what the issues are.
And if you haven't been seeing each other recently you may not even know everything going on in their lives

Maybe work on sorting things out at a less pressured time of year?

What relevant bits are you missing that would give a more balanced view?

Is "DS" here sister?