I've always hated it too. I really get how some people feel and just wanted to share my experience as it has this year changed.
As a child, my mum hated it and I felt responsible for her, unable at that age to realise that no one is responsible for anyone else's emotional health or reactions.
As a young adult, trapped, in a family that had "always done it" a certain way despite that way being misery.
Once I qualified in my profession - volunteering to work Christmas. The best Christmasses I'd ever had.
Once I had a child, I vowed not to pass on this inheritance. I didn't do too badly the first couple of years but I sank miserably after that. Untreated SAD, and the stress of single parenthood, but neither excuse failing to hide my hatred for what should be a lovely time, for several years. I've done a lot of work this year, on loads of stuff, and have built up gradually, enjoyed shopping, truly celebrated Advent, there are candles, favourite foods, and modern carols woven through our family time. The day itself will be peaceful, church, presents, cooking, eating, talking. I feel like I am breaking almost a curse. I hope it is in time for DD to forget my black, bleak years. I don't want her to be having to work on it like I have.
I'm doing voluntary homeless work over the time between Christmas and New Year - did last year too - gets me out of me, me, me.