Could bullying have affected my grades in school?

I was bullied almost everyday for the last 3 years(Grade 10-12) of high school. Firstly, In grade 10 I had an heavy depression episode were I had to go to a pyscatrist for a few months.From the I was bullied by a group of 6-9 guys who would constantly pick and make jokes about me, sometimes for the whole class to hear.I took subjects like maths and physics, it was definitely really hard but I had tuiton sometimes. I had finished school with the lowest pass, even though I pushed really hard in the last year. I always wondered if the bullying was a reason I did badly, I was also really introverted and had few friends .