I wasn't so much bullied as excluded in primary school. Nobody wanted to be my friend and I never really understood why. It was probably because I was the 'weird' kid in comparison to the rest of the class: I was well behaved and they weren't. There were two classes in my year group, and my DM begged the HT every year to move me to the other one (they were more like me) but she always refused. So I had to stay in that class for 7 long years. Only one teacher seemed to care, when she was doing seating plans she took me to one side and asked me if I got along with X or Y. When I said no, she promised not to sit me near them, and she didn't. I still had to sit next to someone who didn't like me very much, but at least it wasn't one of the worst ones.
For a couple of years I did have 2 'best friends' who clearly preferred each other (their DMs were friends), but we played together. But if we had to pair up then I would always be the one left out. In Y3 one of them left to go to a private school, and I was so happy because I thought I might actually have a chance... and then at the start of Y4 the other girl left to go to the same school. My family couldn't have afforded to send me there, so I was alone again.
I also had thick, curly, short hair until Y5. One of the boys in my class started calling me 'Fluffy', and I hated it. My twat of a father said he thought it was 'quite sweet'. Dick. I'll never ever have short hair again beause of that.
In high school I made my own friends and managed to ignore most of the people who made me feel so small and insignificant from the age of 4. My self esteem has never, ever recovered.
I have a DD and a DS now, and it terrifies the life out of me that they might have to go through the isolation I felt, or the physical/verbal bullying that so many others have suffered. DD is going into Y1 in September and DS is only 1, so there's a long road ahead. So far, so good.