This has to be merged with inherited lineage trauma. I've seen many adults of the previous generations who were incapable of talking or listening normally, creating cycles of silence and rage. It took decades for me to snap out of it, and when I tried to get the point across, they kept repeating nodding but repeating the same things. Very disturbing.
I've had a chat with psychotherapist one and we both agreed, at least from our own limited experience - previous generations were/are very stiff when it comes to emotions, sharing them openly, talking about them.
I mean even within 1 generation, from my father to me, the difference is massive. Not sure on what to pinpoint it exactly, we saw and see massive transformations of our societes at neck-breaking speed. When my late grandma saw how I hold and hug my then-girlfriend, she just sighted 'why cant I have a bit of that', and said similar stuff about my father (aka her son just to be clear).
In fact, I used to be like you describe when young, quiet till explosion, rinse and repeat. Something when growing up changed in me, I was growing up slowly till my mid 30s, even redefined who I am by diving into mountain/extreme sports, handling one's fears ie of dying quite regurarly has quite an effect. Plus a lot of backpacking around the world in 3rd world countries, I cant be xenophobic or +-racist like many former peers even if I tried hard after that. My parents lived in communist eastern block, this kind of adventure stuff was unheard of, so I dont blame them.
My advice to anybody and everybody out there - expose yourself to intense experiences, cultures, understand how everything works (schools made me hate those topics, took a decade+ to find my own way back to them). Everything changes you, imprints on you, makes you richer and better person, the more intense experience the more profound effect. Just stay the fuck out of comfort zone for as long as you can.
