I don't think anyone is BU to hate it. It would be U to inflict that on others though but there is nothing wrong with quietly avoiding it where possible.
I find this time of year hard. It just amplifies the fact that my family are miserable, toxic and inconsiderate, and reminds me that the few people I really cared about are cut off from me since I revealed the abuse that had happened when I was young. Xmas was miserable and boring enough before that, but even worse when it became just me and my parents. So Xmas makes me very sad that I don't have a nice family.
Now with DCs I make an effort to make Xmas fun. I have put pressure on myself in the past though and I have only recently lowered my expectations. Because for them, Xmas is naturally magical - they do so much at school, they see things on telly etc.
I totally agree with keeping the bits you do like, and ditching the rest. Thankfully my parents aren't bothered that we want to spend Xmas on our own. Gradually we are building up our own traditions (even if a few were nicked from MN to start us off - DH was abused too, so we pretty much had to start from scratch) and Xmas is shaping up to be lovely.
This has been an incredibly shit year and I am looking forward to a few days of playing games, watching new movies, eating nice food and giving each other gifts. And opening a few gifts from my 2 MN secret santas - now that really has made Xmas special. It's not about the gifts (though of course that is lovely) - but knowing that two people have actually taken time and effort and money to think about a complete stranger has really made me humbled and happy :)