I didn't talk about my DTs birth for a long time afterwards as it was too traumatic for me to speak about.
How awful if the 'friend' I'd chosen to talk about it to had been someone with an inability to sympathise or empathise with me.
I think my DTs birth probably would have qualified under your trauma criteria; I was seriously ill(pre-eclampsia & cholestasis)so had c-sec, they were prem and went to NICU and it was 24 hours before I could hold my babies, weeks before I could take them home.
A friend of mine gave birth a month after me. She had the birth I had planned in my head before I found out I was expecting twins and then became ill - home water birth, 'straightforward' vaginal delivery, healthy term baby.
Yet months afterwards she had flashbacks to the birth and felt traumatised by the lack of control and how frightening it felt. Her feelings were completely valid.
If we entered a 'who had the worst birth' competition then yes I would probably win just as there would be many others who would 'beat' me in terms of babies who were left with lasting problems.
The thing is, though, it's not a competition. There may be a small proportion of tragic births and those with long lasting physical implications. We can all acknowledge how terrible that is. There is also a proportion of births where mums have feared for their DCs and have been separated from them. Again, we can all acknowledge that is horrible.
And then there are those 'normal', 'straightforward' births - the ones where women go through excruciating, terrifying experiences, feelings of loss of control/ dignity/ powerlessness.
I don't begrudge those women their pain; I acknowledge it, just as I would hope women who experienced worse than me would understand that categorically the day my DDs were born was at that point the worst of my life. The outcome was, thank goodness, eventually happy but at the time I was left bereft, frightened and wondering if really I had had any babies because they had been taken from me and if they or I would survive the night.