The learning curve is not static. people have peaks and troughs in it, just as much as they do with anything else.

When you first start the learning process you find that these peaks and troughs come along short and fast and as you continue to learn those peaks get higher, however they also come along more slowly and the troughs can be really bad.

However its all just a question of perception.

Four basic stages of skill

1. Unconscious incompetent
2. Conscious incompetent
3. Conscious competent
4. Unconscious competent.

In other words... stick with it!