Hating your body is common. I hate mine, every time I look in a mirror. I see a middle-aged male, I can see what could have been had I come to terms with being TS earlier, and I see the damage and limitations of what I now have to work with.
Everyone wishes sometimes for things that cannot be, that they grew up differently, that they were shorter, or smaller-framed, or whatever. Natal women wish for such things, too. Still, some of your words concern me. Having a more feminized body - your body - is absolutely achievable. But weak and helpless? Being shorter than you are? These are expressions of longing and pain but not a healthy focus looking forward. Take an honest assessment of yourself to see what your possibilities are. The transformations I've seen are AMAZING. April is one example. Even knowing this, I continue to share some of the despair, but I've seen more than enough to give hope, too.