The more I think about it I realise I was mostly unhappy. I was fortunate that I was smart and top of the class for maths and was liked by the teachers. But I've been remembering the bullying I've experienced. There was teasing, name calling and the general being excluded from playing with others the playground or in the classroom. This was from multiple people who simply didn't want me to play with them.
I also got beat up multiple times. I was hit with a cricket bat and my worst memory is being beaten up by a classmate in the playground. This classmate would then go out of their way to annoy me by constantly following me around, sitting with me and being a general nuisance. He also used to enjoy reminding me that he beat me up.
And FFS the stress of the 11+ ruined my mental health. (I thankfully got into a grammar school)