> Then there's the incessant beeping at you
As a Canadian that did a road trip through the balkans over the winter, the rental car was constantly beeping at me for something. It was misreading signs and due to the bad weather (it was during a huge snowstorm in January) the roads weren't very clear and it was constantly confused. I also had some very unhappy drivers (especially in Albania) furiously trying to get around me, causing the car to further slow down to "avoid collisions". I was already stressed enough driving through countries with mixed driving records, but any actual defensive driving caused the car to nag me.
Sorry in advance to any Bulgarians, of which the car had plates from, for probably tarnishing your reputation.
My friend rented a car and he told me that the wheel was moving by itself trying to follow the road. Then he tried taking his hands off and see if the car would follow the line. Nope, it would go straight into a wall (he of course was going slow for the experiment and didn't hit the wall). So it was more like fighting some "smart" feature that distracts you even more from actually pointing the car where you want it to go.