Even if the lights are leveled correctly, part of the problem is how directional LEDs are. On a flat surface you're fine. If you're cresting a hill so your vehicle is level and there's someone coming up the hill towards you, your headlights are shining directly in their eyes. As soon as you start descending the hill your headlights are now pointing in the right direction relative to oncoming traffic again. Adjust the headlights down and you just change the angle that this happens at. Adjust the headlights down so it only happens on particularly steep hills, and your headlights are basically useless because they're not illuminating enough of the road in front of you.