Modern cars are fitted with LEDs which generate a much whiter and more powerful light beam than older bulbs, even those neons beloved of upgraders and HALFORDS* modifiers

. The LEDs plus the taller bodies of SUVs make the lights more prone to the dazzle-effect. One suggestion is to look straight ahead rather than do the literal "rabbit in the headlights" thing of staring into them.
If your car doesn't have an auto-dimming rearview mirror, reach up and click the rearview to the manual dim position. If the clown behind you is driving too close to your rear bumper, give them a blast of rear fogs and/or tap the brakes. The sister, of all people, complained that some eejit was trying to overtake her recently and there wasn't enough room between her car and the car she was following to permit the manoeuvre (person oeuvre?). She wanted to report the driver for dangerous driving. I suggested to her that she refer to the Rules of the Road online instead.
Another problem is the HALFORDS* crews are fitting LEDs into old headlights, where the reflectors aren't designed for them and they may scatter the beams unevenly; old scratched or damaged headlight lenses with LEDs shining through them will also have the scatter-effect, rather than focussing the beams down the road or down and to the driver's left for near-side lights.
Personally I don't mind the cars with bright lights, its the idiots with no lights or blown bulbs that get my goat, that plus as I mentioned before the utter clowns who forget the their cars have DRLs and never hit the switch for side-lights or rears at night or in conditions where visibility is poor.
*other motor factors may sell products similar to HALFORDS.
[crossed with a couple of previous posts - phone call in the middle of composing, sorry]