I even liked the 180 degree turns as it reinforced (to me) the idea of slow in-fast out.
When I was corner working it looked more like pitch and catch.

I too found the course frustrating. The problem was there was no variety. Most of the corners were about the same radius and angle plus the distance between them was about the same. This favored some cars more than others depending on your gearing and tires.
I always seemed to be between 2nd and 3rd gear.
