Of course you're not! After 7 hours of lessons I was just starting to do my maneuvers, pretty badly as well I must admit!
My instructor had to use the dual controls a lot too, especially when approaching traffic lights as I had a tendency to brake down the gears & then my foot would move from the brake to the accelerator even though I didn't press it down!
also used to go in the wrong lane for roundabouts, & mess up hill starts. I even nearly bumped the kerb doing a reverse round the corner during the lesson before my test because of nerves, & he had to grab the steering wheel!
I wouldn't worry, everybody learns at different rates. I had 50 hours of lessons before my test, my friend had around 60 & my brother only needed 30 (though he passed 2nd time not 1st like me, but that's probably because I had more lessons, I don't know).
Keep practicing!!