My father was an introverted social isolate who alot of the time wasn't interactive or verbal with me unless it was to say offensive shit to me, he would oftenly if it wasn't the belt he had a habit of pushing and shoving me when he would get mad which was frequently over stupid things to get mad about, one time he knocked over and broke a lamp after pushing me, and while I was in highschool and a couple years after his asshole tendencies were off the charts including where he decided to run up behind me and punch me in the back of the head in public when I was 18, I still live with my parents and he's better nowadays atleast but remembering his screaming and raging voice infuriates me to this day.
While that story isn't that bad in comparison to other ones regarding father's but that's only a very small category of my abusive history, I was bullied and isolated terribly to the point of being beaten up on aoccasions and having objects and homophobic slurs thrown at me on a daily basis, I was psychologically abused several of my teachers who also joined in on thr bullying, in elementary I was constantly being sent to the principal office over things they very knowingly knew I didn't do or would deliberately take way out of context just because they like seeing me in distress. I've had very few friends growing up and my controlling Mom also contributed to that, I was hardly ever allowed to go to my friend's places among the few that I had.
There was my entitled and raging brother, he always had a sense of ego and entitlement to unconditional respect from the world because he was the oldest, who not only constantly talking shit and picking fights with me while also hitting my sister but it was his massive projection act that he would use when arguing with me or whenever our mom would get involved that infuriated me. He on a daily basis would go tell my parents that I did or said something that I did not to try to get me disciplined, he would entice his friends to say shit to me and on multiple occasions tried to stab or hit me with blunt objects, after when I KTFO'd him when I was 14 or 15 when I punched his head into the fridge he started it again he (though right after he woke up he tried to stab me with a fork then later to spray me in the eyes with a cleaning spray) went from being physical to entirely verbal and of course starting shit anyway he can but more like a snake, he would steal things of my bedroom, dumped my medicine pills in the trash or down the drain, and he would make up any story he could think of to my parents to get me in trouble in some way, to this day while he pretends to be nice on the surface with his high pitched virgin voice, he hasn't changed considering the amount of items he's stolen from me including my parents whenever he came to visit, he's married and his wife is also like he is in some ways, she's an extreme leftist and likes to antagonize and start drama with my mother because she's christian and religious, she has an overall emphasised self righteous and victimhood complex, all the time before she blocked me posted batshit crazy things on Facebook.
Overall I would have to say the lifelong chronic verbal harassment and social including romantic isolation and being unsuccessful in life overall was the most traumatizing.