And more seriously some people I know go into a major PTSD mode during the "holidays" because their childhoods were so gothically horrible that memories of family togetherness are a symptom rather than a pleasant reverie.
It's a big joke in our culture that holidays are a stressful mess and that everyone is miserable and drunk, etc. "Surviving the holidays" in every way is the goal. It's linked in my mind with the "Safe" thing, e.g. "Have a safe holiday!". It's sort of assumed that you'll hate the whole thing, drink like a fish and pop pills, and die in a 7-car pileup on some snowy turnpike, thereby causing what the newspapers inaccurately call a "tragedy".
My family's troubles are constant, ongoing, and subtle. We don't have screaming matches or drunken rampages, no one hits anyone, and we don't say nuclear weapon phrases like "I don't love you". We may undermine for years at a time, or be unreasonably irritable, or fail to connect in some dispiriting way. There are conflicts and painful situations that aren't allowed to be mentioned or discussed.
But we don't have "holiday" stress. Despite all my complaints about my psyche and my issues, I'm very grateful for my family 99% of the time. My heart goes out to everyone who has to Survive instead of relaxing around now.