I know at least one person with a 100% disability rating from the US military for PTSD and have heard it is not unusual.

People who’ve never suffered a serious mental illness sometimes drastically underestimate the intensity of the suffering mental illness can cause.

Indeed there are people who physically feel their depression so profoundly that they are barely able to lift themselves from their beds in the morning. Depression has nothing to do with being 'down in the dumps' and has to last more than 2 weeks before it becomes a clinical case.

While suicide might seem like a cowardly way out to some, there are other sufferers who choose to take their chances with electro-shock therapy, which has experienced rejuvenated interest over the past 20 years. It should be clear, however, that anyone pursuing it has exhausted all over treatment and is still suffering to some great extent.

I'm happy to hear that you've seemingly never met anyone who is in extreme psychological anguish. It's horrible. She'd been suffering since 2016. How much more would she have had to endure to appease your inner critic?

She'd been suffering from major depression, panic attacks and suicidality. PTSD was more than likely a convenient excuse for the symptoms for physicians. (Considering other pieces of life history.)

We are talking about a teen into 23 with improperly treated mental health issue here. People get treated for decades for this kind of thing, not 5 years of trying mostly new drugs with side effects to paper over it.