Don't despair Jamie. I also didn't hate my body. I have always stayed in shape, so I thought of my body as good looking and healthy. That changed after accepting being transgender though. One day, after cleaning myself, I looked in the mirror and thought, "WHAT THE F**K?!?!"

I think what caused the change was, until that point I never considered deriving any happiness from my body, and just focused on functionality. Now that I was seriously contemplating the happiness having a female body would bring me, looking at my genitalia, and the definition of my muscles, made me feel wrong, very strange, and a little sad.
Gender dysphoria is a new and uncomfortable experience for me, but acquiring it was vindicating, and in my experience, it is not nearly as difficult to live with as repression. If you want to experience it, try stretching the limits of your imagination, and envision living as female, from the sun in your hair, to the nail polish on your toes, and then take a shower and see how great you look.