As someone who was diagnosed with ADHD a decade-and-a-half ago in my 20s: You don't. You don't even think about using your diagnosis as an excuse or a shield for behavior that is unacceptable. You never consider thinking that you deserve special treatment because you were diagnosed with ADHD. You accept that there are tradeoffs that come with it, some positive, some negative, and that you will have advantages in some areas and disadvantages in other areas and you don't let it define you or your behavior.