Garfs
It certainly is NOT you. If instructors responded like this every time bad weather forced a reschedule then they would soon have no students. You will find the opposite happens more often, i.e. the instructor cancels the flight because the aircraft has "gone tech". This usually means it has not been properly maintained or they don't have the cash to repair it.
If I were you I would go elsewhere. It is imperative that you get on well with your instructor and even if you are going to the USA to train, you are giving a school the opportunity to show you why you should not.
Good luck with your training