The phrase "hadst breakdown" can be described using a variety of synonyms. Some alternative ways to express this idea might include saying someone "experienced a mental breakdown," or that they "had a nervous breakdown." Other options might include describing the experience as a "breakdown in mental health," or even simply saying that someone "had a breakdown." No matter which phrasing is used, the important thing is to acknowledge that someone has undergone a difficult and potentially traumatic experience, and to seek out appropriate resources to help them address their needs in the aftermath.