Why would doc say I have the worst case of astigmatism she has ever seen?

Heavy handed. Asitgmatism is an ovalness of the optical parts of the eye which requires a reverse oval to correct in the eyeglasses or contacts used to correct it. It is common and in some cases can be quite extreme. Perhaps your doc is inexperienced, has not seen many cases and you are the worst. Or perhaps your doc is a little insensitive and overreacting to things. A second opinion can be helpful.