Higher schools never promised a successful career.
The one who has talent, managed even if he didn't finish school.
What matters is who is what kind of person.
I am sincerely sorry that in your school there were jerks around you who bullied you because you were not in their group (white people, rich people, or whatever).
I had several quality and good friends at school, some of them became more successful, some less so, but they became good people. I still hang out with four of them today.
I also had brats, bullies and stinkers who lived to humiliate or hurt others, but today there is no place for them in our chosen society.
When we go to a gathering, the 5 of us sit together, as well as when we go alone to a bar, and even today we don't notice those who were bad people when they were young.
To some degree I envy those who had a really nice school experience, good friends and all. I had that outside of school and to some degree within it (high school mainly) but I'd certainly not say it was enough to make me feel like my school days were good.
There's always some asshole who wants to fuck with others and that's the same all the way through life I guess, what matters is that we (I) learned to deal with it as soon as possible and focus on creating the life we want. I'm pretty confident in saying that most of those assholes from school would onsidee me to have created a very good and comfortable life...although what that garbage thinks is of no consequence to me.
it stopped being important to me long ago, what anyone around me thinks about me (and especially some "low-quality" people) - I value only the opinion and comments of the closest circle of people.