Why do you think you do this? Where does the anger come from do you think?

Anger certainly doesn't have to hurt anyone, if the note doesn't work sometimes simply saying "I am really pissed off, and I mean really really really pissed off" might work too.

I think you can let yourself off the hook a little bit here. You don't have to attack, you don't have to do anything at all in fact. You get to keep this therapist if you want to. It's okay. Being angry doesn't have to spoil anything.

You feel the way you feel, but it requires nothing of you.