Thinking about breaking contract...
Hang in there
I am in my 10th year of teaching overseas in 4 very different schools and locations. Each place having a unique set of challenges none of which I could have ever anticipated. My guess is if you skid out of one contract/challenge you are surely going to walk into another one. It is just the nature of the gig. Stick it out. You say you are in a tier one school (I don't really believe in the tier system) but if that is what you believe, you have it pretty good, and it may not get any better. If you continue to move away looking for the "ultimate" you will be moving around forever.