It sounds like you're referring to what's known as 'lane assistance', and unfortunately it's a bit difficult to avoid without buying an older vehicle, because it became mandatory on all new cars from 2022. In most cases, the system automatically switches back on every time you restart the car.

However, if you want a more 'analogue' experience without having to rely on a big screen, a Mazda CX-30 will be worth a look, and it's available with a petrol engine and an excellent manual gearbox. It does still have a push-button start system and an electronic parking brake, however - again, these are quite hard to avoid now, but you may find you get used to both elements quite quickly.