You forgot Secret Santa.
The threads on that are endless: I received rubbish, I gave a great gift unlike everyone else, I think the whole idea is rubbish.
DS1 doesn't believe any more. What consequences should I threaten him with for spoiling things for the younger DC?
Christmas is bad for the environment, with the cards and wrapping ending up in landfill. (Will Greta become the new Scrooge?)
Now for some which I haven't really seen on MN, but which are typical of MN:
I don't want my Christian MIL indoctrinating my children about the birth of Christ, with all that nonsense about the virgin birth, Bethlehem, and the Angel Gabriel.
Boris Johnson wore a Santa hat on TV. AIBU that this is totally inappropriate, and traumatising for the children?
Why does it never snow on Christmas Day (in England at least)?
And now, everybody, here is my own personal biggest first-world gripe about Christmas: the lack of netball.
In the last week or two, players frequently miss games because they have to attend office Xmas parties, so we have to forfeit them, and then there are no games until the new year.