I don't know if they all have difficulty dealing with these issues. I do know that having ADHD/ADD can lead to immense frustration. How to deal with that is I guess the question.
So it sounds like people with ADD /ADHD have difficulty dealing with frustration and anger issues.
The trouble with ADD is that if you have intelligence, you get frustrated! If ya ain't that smart, you don't notice that other people are doing what you know that you could/should be able to do. Even with little kids, my best clue to the fact they might have ADD was the frustration they were showing.
The problem is that you can't keep frustration inside of you. That creates really harmful effects both physically and emotionally. I really can't tell you how to handle frustration because we all do it differently (exercise, counting to 10 backwards, drinking, etc.), but if you can figure out how to express it constructively, and understand that doing so is a way of dealing with ADD- I think it will help you.