AA 7 RAC have raised this plus others - google it
"The UK government's Department for Transport (DfT) is investigating headlight glare after receiving a petition and other feedback from drivers:
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Yeah, I recall reading something about it in the beeb news. Hugely late though given that there are already 100,000's vehicles on the road designed without consideration to oncoming drivers.
I also struggle greatly with the full width lights some cars are fitted with these days. They are so distracting. Fashion beyond function, or giving people a usp so they buy another car! Grrr.
Re getting dazzed by oncoming cars, I always focus on the left hand kerb when it happens. It takes your eyes away from the brightness and ensures you are still looking up the road. Works for me.
LV I reckon you are spot on with height adjustments on headlights. I'm guessing over half of drivers wouldn't even understand what it was for!