This is only tangentially related to your story, but you reminded me of an old maths teacher who had a PhD in maths and once upon a time, had applied to work at an accounting firm. As part of the interview, he was told that he would have to sit a numeracy assessment. He responded "you do know I have a PhD in maths, right?". They sympathised with his point but told him that everyone had to sit the test, as a matter of course.

So my maths teacher goes and sits their silly test, and he scores so well that they accuse him of cheating! I can only assume that this debacle broke him in some way, because it wasn't long after this that he started teaching. It's a particular kind of weirdo who has a PhD in a subject and decides to teach teenagers. He was probably one of the best teachers I ever had (I wonder if I can find contact information for him to tell him that)