There are shining moments to look back on too? Excellent...hold that thought.
Sad that in struggling to move away from a "school" like that, every aspect of the experience becomes tarnished. Take what is good, and let the rest go, when you are ready.
My thoughts on reading your post - that there is still much that is healthy in you;
that no matter where we find ourselves, there are always people like, Ellen Marie, was it? who's ego requires that other people do less well, but do it their way...;
That there are good and bad eggs in every group;
That ultimately, we are here to learn, so no life experience is a waste of time...not saying, it's okay if you were deceived, or that it should all be smiles and handshakes and bygones - just saying that, for what it's worth, there are some good experiences to be had even in the weirdest places, and if we can hold on to those and discard what does not serve us, we have gained.