I was bullied for being traumatised due to abuse at home. It made me despise most people, because even if you need to bully anyone, who'd sink so low as to pick on someone who is already going through hell?
I recovered well when I left, partly by making all the usual "they were kids", "they probably had their own problems they were trying to deal with" excuses for them.
But then I gradually came to face the fact that I was an adult in a society where the majority of people either support things like cutting mental health care and leaving disabled people - including those with mental/physical health problems resulting from abuse - to die (for spurious reasons, too; it would cost the economy less to support people properly, afaik), or don't think those cuts are wrong enough to at least get out and vote against them.
And it's made me think: what's the point in recovering from bullying past the point where you've got your self-esteem and self-confidence back? Because real life is barely better than school, really. It's still mostly about kicking people when they're down. And people could choose to be better. Most people could be amazing. They have that potential. But they don't, they choose to throw away their capacity for empathy and integrity.
So I don't like most people very much. I give everyone a chance, I don't assume any one person is that bad, and I do everything I can to make positive social change (in a fairly emotionally-detached way), but viewed as a population, I just don't believe the majority of people deserve any respect.
Bullying teaches you negativity. It's better if it's turned towards people who deserve it rather than towards yourself, but it still makes life more difficult. I suppose I'm more of a realist because of it, and use that in a positive, constructive way, but I'm not exactly happy, because I'm so dissatisfied with the world I have to live in. Whether school bullying or the bullying culture of this country as a whole that's done that... I don't know, I suppose they're both the same thing, really. School bullying is probably still so common because treating innocent people like crap, to the point where there's a good chance they'll end up dead because of it, is still seen as a virtue, especially if it's dressed up as being somehow for their good or the common good.