There are certainly some pretty terrible and abusive teachers. I was fortunate that I didn't actually have any myself, but there were a few names that were recognized by the entire student body, known for being utterly unhinged bitches whose only goal in life was to cause and spread as much misery as possible.

I was damn lucky to have some legitimately good teachers. And I honestly feel a bit of guilt that I haven't done more with my life, given how fortunate I've been. And I won't make any excuses for myself. I was a lazy and perhaps spoiled screwup. Probably still am.

I had trouble with math too. Still do honestly, but in my case I couldn't really blame the teachers. Well mostly. I will say that their general approach to teaching more complex and abstract subjects like that does tend to be absolutely terrible, and has only been getting even worse.

Like you, I've had more luck trying to learn that and coding on my own, at my own pace, in more practical situations that offers more useful and motivational insight than I could ever get in the classroom.