When anger is quick and easily resolved the issues don't stick around much. Try and process the little anger while it is happening. Try and take the BIG ANGER offline, out of the relationship for a moment, and come back with some ideas of how to do things differently.
So while I unload and vent on this site from time to time, know that my intentions towards my kids are pure and my relationship between myself and my ex-wife may be in the "it's complicated" setting for now, but we're working on it.
There's no good way to share that the holidays are a tough time for me. I will be looking after my own health and happiness much of this season, to assure that no meltdown occurs in my life. But I will also leave some of my bandwidth open for my kids.
In disappointment, I withdrew into my Buddha-like head and perhaps developed a Buddha-like belly at the same time. She withdrew into more anger and disappointment, and perhaps into an escalating spiral she could not see a way beyond.
We all learn about anger at a very young age. Before we can understand the language we are being given verbal and physical clues about what is a right thing to do and what is a wrong thing to do. For most of us lucky ones, this guidance is done without the injection of anger or physical abuse.