Not directed exclusively at me, but I had a math teacher throw a temper tantrum directed at a classroom of 4th graders about how much of a personal injustice it was to her that our parents kept sending her complaints, and that has got to be the worst thing she did.

To give you a picture as to why she might've been getting so many, when my Mom sent in one of these "complaints," she received a response in the form of a metaphor about how coal must be put under immense pressure in order to become a diamond... I think my Mom responded that something like a flower might serve as a better metaphor for a fucking 9 year old, though I doubt it did much to change that jerk's mind.

Anyway, having her as an instructor set me back at least a year in math, and I've had other people who were in that class say that that's where their issues with anxiety started.