Canyon, it's a learning curve. Once you learn how it's easy, so long as you have the patience to maybe restart a few times -- because there's more than one racing line.
Stadium, the steering isn't sensitive enough to make most of the curves without having the perfect racing line (which is hard for me -- maybe not for other people so much). I restart a lot more on stadium tracks trying to get the gold medal than I do on canyon.
I admit, it may be my coordination disability that makes Canyon easier for me. But that's not my point

My point is that your position (that the steering is bad) is not what everyone thinks.
I know another game that you should try if you think the steering here is bad
