It was a complete waste of time for me. I did not learn a single thing of value in high school.*
I didn't like the people in high-school, the teachers and admins were pricks (even the ones I liked had to be pricks by the school's rules, so it's not their fault) and we didn't really get any freedoms.
Looking back, I should have done Running Start. It's a program where you get to go to a community college for free while still in high school. Your credit counts towards both high school and college, so you can at least get the BS classes out of the way. But "running start" seemed like something the kids who knew they were stupid did, something like technical school, but for those who know they have no future, instead of the ones who want to change their future. Turns out I was wrong and I made a big mistake by staying in regular high school.
*I did learn a bit, but if you take the ratio of things I learned vs. time spent where I could have learned something, you end up getting 0. I swear, there was so much busy work without any point it's ridiculous. It's day care.