I would suspect that the hostility you felt from the officer was because you got your car back and no one was injured so there was no glory to be had in arresting the thief.
We learned from this lady that our neighbor's meth head twentysomething son had a girlfriend who lived in the same neighborhood as she did - where my stolen car was abandoned. A lazy cop would call that one hell of a coincidence. A motivated cop would have made the effort and rid the neighborhood of a pest who had graduated from petty crime to multiple felonies.
Just one example and honestly, what are the odds of all those pieces coming together, but it does show that selective enforcement isn't impressing anyone.
So the two concerns overlap, sometimes.