(((hugs)))
I've been there. I've been there when my son (who was about 15 at the time) looked at me after AXH had reduced me to a crying mess with insults and downputs in front of the children. My son just looked at me, with more disgust than pity, and asked, "HOW MUCH are you going to take?" and walked off.
He had nowhere to go. At least your son has a good home to go to, and one where you know he will be safe.
But what about you? Are
you safe? Now that there's no 15-year-old boy for your ABF to yell at when he's drunk?