Just as a counterpoint...I was successful throughout school and college but crashed and burned as soon as I moved to a new city for a software job at Amazon. Later, after quitting due to mental health issues I got a diagnosis for ADHD. I took vyvanse for about five or six months, but it didn't really help with my ADD symptoms and it gave me heart palpitations and made my anxiety worse.

After a lot of introspection, I realized that I was actually choosing to be disorganized, bad at managing my time, etc, because I didn't see these things as a priority. I've been working on my executive function, treating it as a skill that is possible to learn, and so far it's going well.

I got some really good advice from my therapist, who told me to stop saying I "should" do things and instead be honest with myself about whether something is actually a priority to me. She pointed out that whenever I tell myself I "should" do something and don't do it, I'm training my brain to ignore my own decisions. Before, I think my mindset was that I have default behaviors, and doing something productive takes effort - now I remind myself that I'm making a choice even when I default to my old habits.