Yes he knows he has ADHD (as well as OCD) but maybe his meds aren't working? I feel like the level of self centeredness is just at a whole other level altogether. Maybe I just don't fully understand the diagnosis.

The family member I referenced doesn't have ADHD (that I know of) and he's still rude like this as well. So I have to wonder what's going on with the few people who are okay making others wait for them.