I unraveled at 46, at the peak of my job and a wonderful marriage. I was dragging along an awful lot of emotional baggage, and it spilled off the cart.
Three years, a lot of meds and therapy later I am close to stable again. I'm still not able to work because of physical and mental issues, but I'm better than I was.
Had an alcoholic mother, physically and emotionally and physically abusive father, and they fought all the time. Like Skeezyks said, it led to even more trouble down the road as an adult.
So, you're not alone.