In the case of my household, eventually the teens got old enough to notice the patterns in the emotional dysregulation and therefore it came out of the blue less often, and also got the emotional skills to occasionally interrupt an emotional dysregulation cycle that was building toward some kind of outburst, such that the outburst didn't happen. As well as the ability to simply be elsewhere.

In my father's specific case, undiagnosed autistic sensory sensitivity was simply not compatible with toddlers and elementary school children who emit several types of sensory hell all day every day, and he should not have had children. He never went to therapy but I did.