Middle School Struggles

Math has been easy for me till i hit high school. I did not struggle in middle school or in elementary school. Why i think i did not struggle in middle school is because the teachers were better at teaching and actually dedicating themselves to teach the kids and for them to have a better understanding. In the past when i used to struggle in math i was confident enough to ask the teacher for help. But now that i am in high school that changed because the teacher is kind of mean and does not really teach well. In the past when i would struggle on a difficult problem i would work and continue working until i could figure out the solution. I was doing this because wen i was in elementary school i felt more like i know what i was doing instead