This will only work out for you (and others) if there are other manufacturers that don't add features like this at all. And since you haven't provided feedback to anyone about what you don't like, other manufacturers won't hear about this either, and may also add these sorts of features.
I agree that one person providing feedback isn't going to do much. But that's why everyone needs to do so. It's like voting: your individual vote usually won't change anything, but the votes of everyone can. Refusing to provide feedback (or vote) because your individual action won't change anything on its own doesn't solve anything, and just gives those in charge less data to work with to figure out what people actually do want.
And then the VW software team managers say "Look how great Tesla's are selling. It's because they have more autodrive features. Give me more money to add more features." Note, that was "add features" not "improve features".
Writing to or calling the manufacturer may be effective for small companies, or companies with a good track record in ethics. Otherwise, let the sales do the talking.