I have a car from 2023, and I think thats the last year before they started adding shit to the vara, like beeping when going over speed limit and filming the driver.
So if I were you, I would look at cars from that year now, and you hit the sweet spot of getting a 3 year old car for almost half the new price.
You won't be able to disable stuff, it will get worse and worse every year as drivers gets used to it.