In my experience it is very very VERY rare that a teen can “explain” something in the additional info section without sounding like they are making excuses or whining… From this posr, you are not the exception. I can’t see even asking your GC to mention this as no prefdssional would throw his colleague under the bus. Boo hoo. You had a bad teacher. Wait until you have a bad professor or a bad boss.
On a side note, there is nothing urgent about your question so I edited your clickbait header.