A lot of people have heard of the five stages of grief (aka "Kübler-Ross model"). They were developed by the Swiss psychiatrist Elisabeth Kübler-Ross: Denial >> Anger >> Bargaining >> Depression >> Acceptance Fewer people know that the model arose from her work with terminally ill patients (as opposed to people dealing with a bereavement). Only subsequently was it applied to all forms of grief. It’s also been widely misunderstood as it was never meant to be viewed as a linear process nor that all stages apply to all people. "Kübler-Ross model" model can help us make sense of our own experiences but it shouldn’t be seen as validation nor is it a mold that our own experiences need to fit into.
Growing up, I developed a deep need for validation. Validation of my feelings. I’m assuming this is the same for most children: we look to our parents and other people around us for guidance. We are praised for doing things “right” and told off for doing things “wrong.” I’d say that most of us are raised with a binary view of the world: it is good and that is bad. It is normal and abnormal. Appropriate and inappropriate. And those seem clear cut – only that they aren’t and growing up we are always trying to figure out what is expected of us and it can feel like walking a tightrope.