It may be my poor grasp of the english language, but I don't understand what the problem is.

I if caught it, you are complaining because your teachers, instead of acknowledging your (supposed) inferiority and giving up on you, keep encouraging your and opposing your depressive's dysfunctional view of the world (quite typical as emerges from your words).

Unless I grossly misunderstood (in which case I apologize) it seems to me like they are doing good...