Medication itself is not a silver bullet. Structure, exercise, figuring out works best for themselves any day of the week, support network (both formal and informal)... There are over 200 genetic markers for ADHD and each person has a different mixture, nevermind the environmental factors, the experience of societal stigma, and how symptoms can change across a person's lifetime (and also affected by lack of sleep, hydration, diet, stress etc). What works one day, one month, one year may not work the next.
It's not to say that a person with ADHD does not have personal responsibility and accountability, just that even in good scenarios it can be a handful.
It's no surprise that a lot of the issues about and surrounding Clarry correspond to the time he gets his first significant injury (and the loss of structure and routine that comes from that).
(Using your post to further the convo Bing181. Thanks for posting on this topic!)