You are just repeating my critique. I am not the one making the mistake.
"I confess I am a frustrated academic"
in English vernacular being a frustrated X (as in a frustrated academic, frustrated poet, etc.) means that the person is actually not that, but have in some way been prevented from being the thing (frustrated) and have perhaps rancor in regards to the frustration and towards those who actually are the thing (this second feature being sometimes implied depending on who is doing the description of the person as frustrated)
on edit: formatting, clarification
I was only dimly aware of the second meaning of the word so I'm not sure how you would interpret it if you had a good understanding of the multiple interpretations.