What state did you go to school through?
I think I got a bit lucky (and unlucky) with where I was at...wealthier, white suburban middle-upper class in CA.
I can definitely see where some teachers wouldn't cooperate if they are like what my current work managers are like (condescending when teaching and are more "sensitive" to students who might have behavior "problems"- in the work place this translates to bad first experiences and an earth-shattering amount of respect later.) and I can see where other factors besides quality education being factored weren't included in your IEP's or whatever system teachers went by to pass you through grades. Good teachers should sincerely try for an almost zero percent fail rate, regardless of physical disabilities. I'm a big believer in getting a good fit for a student so they do enjoy going to school (I hated it too, but I learned to "fake it until I make it and just getting "c's" got monkeys off my back) I'm not sure about "learning" disabilities so I'm not going to estimate those.