@peachicecream Nonsense. You are doing a massive disservice to people who have actually endured childhood trauma.
From the article you linked:
What came back to me during one of the sessions was a situation, when I got a slam from my dad for setting the dried grass on fire at my neighbor's lawn (the fire spread in a few seconds and it was pretty close to reach the neighbour's house)
What does 'a slam' mean? Is it a thump? Or a stern telling off?
This is the only example from that article that I would agree with could cause trauma - growing up with an angry, explosive parent who cannot be reliably trusted, who may lash out, the child experiences chronic anxiety from never feeling safe. Some will develop c-ptsd in that scenario.
But we don't know if that was the case, or if in the example provided the exasperated parent gave the kid a halfhearted push, or shouted at them angrily (again, what is a slam?) in a moment of fear at the fire. A one off. Kid not normally ever scared of parent. They resolve the rupture in the parent child relationship after the fire, child goes back to feeling confident in their parent as their safe adult. We just don't know.
At another time, I recalled a situation when I got a B at a maths test and when I got home, all I could hear was "why not an A?". At that time, the feeling of being "not good enough" was seeded at me.
I also remember well the moment as it came back to me when I was on one of my first holiday camps, dying of loneliness. I remembered I had to share a room with boys who disliked me, and I felt "different".
I also had a vivid memory from my elementary school: a "colleague" of mine came up with a nasty nickname for me, which he would use whenever he had a chance.
It is offensive and self indulgent bullshit to describe these three above events as 'trauma' in my opinion.
That comment about the A is doing a lot of heavy lifting, if it was one clumsy comment that "seeded" a feeling of "not good enough" 
Parents all make mistakes. That is the whole concept of the "good enough" mother, really, that there is no such thing as the perfect parent and if there was it would actually be problematic - because the child would not be equipped for independent life in the long run if they grew up meeting absolutely no adversity and experiencing absolutely no conflict, with their needs being always perfectly met at all times.
They are certainly unpleasant and difficult childhood memories, but not trauma. Not unless it was part of ongoing bullying from either the parent who made a crap comment about the grade, or from the peers at camp or school.
So no, all of us don't experience trauma as children. It is disingenuous to pretend otherwise.