Defiantly a trade off.. we spend X amount of money for a smart phone that has a poor camera and audio which ends up becoming a paper weight.. Might work for you in the beginning.. but the internal mechanics or the lenses tend to wear out faster than a typical camera. Another fellow not long ago was having the same issue with is camera.. it just kept trying to focus on everything instead of what he wanted it to.
Just so you know, that the lens are actuated on a rotating mount. each lens has it's own actuator.. so in order to focus all of these actuator move independently and when these parts become old or worn out.. it simply can't focus anymore.. thus zooming in an out.. then add the fact that you in a sports car and depending on where the cameras is located.. it wants to try and focus on everything and all at once.. best set the focal point or allowable range to focus towards the interior of the car or just outside the front window etc.
I have a feeling this is why most factory apps/camera do not offer anything to help correct this.. Unless an alternative app like Open Camera allows you to set the field of view and range.. thus limiting the focal point. You know the little green blocks etc when you try to take a picture..
I have yet to explore the video mode in Open Camera, but at this point anything is better than the factory version. Unless you purchase a GoPro..