Earlier this year, I rented a new Toyota Camry (US model). It had lane assist, but it was very easy to override it. I didn't really have to fight it. (And that was nice. I've drive other cars where it was more of a battle.)

So, yeah, it's done badly some of the time. But it at least can be done well.

I don't know, even if it's not that forceful, sometimes I have a light touch on the wheel and I'm going straight, I don't want to suddenly have to fight the car swerving me onto oncoming traffic.