Many people run on anxiety and a good memory and do okay in school, specially if they're gifted. They still struggle, but it's invisible.
Coping mecanisms will lessen with time, and exigency will increase. This causes increasing distress.
Emotional dysregulation: Adolescence is a heightened state of feeling per say, it's an explosion of feeling for the ADHD teen. Friendships and relationships are a double edged sword; if something goes wrong, RSD and the pain can be unbearable.