TMA Headcanon on the Archival Staff & co's childhood social lives
Jon was periodically actively bullied in primary school, especially through people pretending to be friendly and then mocking him for believing them. It's made him particularly sensitive to betrayal and suspicious of kindness.
Martin was rarely if ever actively bullied by his peers (maybe a couple times for writing poetry, or being queer), but he also very rarely if ever had friends. No one noticed him enough to bother with him.
Tim was never bullied and always had an active social life, though sometimes his boundless energy and sense of humor could be A Lot for some people to deal with
Sasha always had a small friend group and wasn't consistently targeted by bullies, but she dealt with subtle racist and sexist harassment from many of her peers. For some reason, those who were dicks to her mysteriously found their darkest secrets the subject of gossip.
Basira tended to have, zero to two good friends at a time, and coped with bullying by emotionally detaching herself completely from the situation, often by studying or reading. When she reached secondary school, she hit back very effectively one time and was mostly left alone after that.
Daisy canonically dealt with her school bully by eventually murdering him. After Calvin Benchley went wrong, she didn't have other close friends, though she wasn't an outcast or anything
Georgie usually had a good friend group, but dealt with social bullying along class lines and probably also for being a nerd. Even though the school wouldn't intervene, but her parents made sure she had therapy and as much support as they could give her. It didn't keep her from being envious of the cool kids, but it does make her the most emotionally stable person in Jon's adult life
Melanie was 100% getting into fights with her bullies (and anyone who told her she couldn't do something because she's a girl) regularly.