over the situation she is in. No matter how hard she tries, it's getting harder and harder to clear the bar set by others. Overtime, her will to continue gets crushed. That's often the onset of depression. She does not want to start anything because she is sure it's going to end in disappointment. She does not want to finish anyting because it'll only lead to more things that she has to struggle with. This then leads into a vicious cycle.
Somehow, she could get back to a sense of her being in control. Start small.
Breathing is always under one's control. But conscious, paced, breathing in a stressful situation takes mindfulness and effort, not easy to do.
Her sense of the "self" is small and weak, so small that it leaves her "being" exposed to the harsh elements. (Think of the "being" as her body and the "self" as her cloths.) The "being" feels vulnerable without the "self". The "being" knows when it is without the protection of the "self" and acts up by screaming.
