Isn’t the point of labeling something as a “trauma” to be a signifier for the moment or behavior that affected you greatly and not something that meets an arbitrary level of awfulness, especially by way of comparison? Your father lost a brother, which is definitely certainly traumatic, but my grandfather lost a son. Does that equate to a greater trauma, therefore nullifying your father’s loss? I would say no! Comparing traumas means in my mind that nobody can ever heal because someone else will always have experienced something that was in some way worse.