Well that was a shit article.
There are some geographical differences and the world was much larger then.
European perspective:
After WWII Europe was bombed to shit. They were rebuilding with basically nothing. Children of that time had nothing. Food at the table and not necessary every day. You got to play with sticks. Even a crappy doll was a luxury.
Child upbringing was a lot more morbid. More children died. Schools were rough. If someone was brutally bullied, it was met with attitudes like "boys will be boys", "it will make then stronger", "that one is not gonna become anything anyway" or "they are just finding their place".
Many male teachers were in the war, traumatised and now teaching children. Corporal punishment was allowed, common and sometimes brutal.
To my experience world after WWII made them though as nails.
Problem is that boomers are old now. Many are senile and turning back in to children. They are turning back to people of that era. Now they are in a strange alien world where people are acting strange. Many codes of conduct have changed and what they consider good manners don't exist anymore. People are hostile in a different way and there are threats they don't even understand. No wonder, if it becomes too much sometimes.
What this article mostly represents is hostile ignorance and stupidity.
Grand sin of our times. We have all the knowledge available and most of us spend our time in TikTok, reacting. Fueling the great dopamine engine.
Allegedly, but holy shit if true. Hard to explain yourself out of that one.