You could look at why it was working on your nerves. Is it an opportunity to work on patience or tolerance?
That's sound advice Mary.
I remember many times that I got frustrated with particular uke's, who either don't do what they are instructed to do, or make the exercise difficult to perform. It slowly dawned on me that I had more to learn from them, than with those who it was easy to practice with.
All practice is practice to work on ourselves, for our own benefit.