Their height probably wouldn't be as much of an issue if they lamps were properly hooded/aimed as well.

It'd be entirely viable, even with tall vehicles, to place headlights low on the front.

EDIT: An older sedan and a truck happen to be right in front of me at the moment (in the US). I think that this nicely illustrates the point:

The truck's headlights are at or above the sedan driver's eye level. They don't need to be there. They'd work just fine further down on the front of the truck.

It is both.

It’s both, but generally it is drivers activating auto dimming not realising they’re unleashing hellfire upon others. some cars are worse than others though, looking at you Stellantis and Tesla.

Very much this.

If every other twat wasn't a driving a fucking wankpanzer to drop little cunting Timmy at football practice 200 frigging yards up the bastard road it wouldn't be half fucking the problem it is.

Annnnd breathe....

Definitely SUVs mostly, from my hour-long stroll this evening to have a bit of a survey. But I was surprised to discover two of the worst were an MG 2-seater and a little Toyota. So maybe the SUVs are too high and too bright.

To a certain extent they already do this, and it isn't enough. Coming over a crest, reflections, poor adjustment or slight bumps in the road will cause opposing traffic to be blinded.