trauma is not defined by the traumatizing thing that happened.
trauma is defined by the reaction of the person who experiences it.
if you are traumatized by something, then the thing that happened was traumatic.
if you are severely traumatized by something, then the thing that happened was very traumatic.
it does not matter if other people experienced the same thing and were less or not at all traumatized by it. because the only thing relevant for judging the severety of trauma is your reaction to it.