Do you see yourself as say a F-35 or Typhoon, or maybe an Airbus / Boeing pilot then ?
You see, in many ways, you exemplify a paradox when it comes to safety....the development of safety features in vehicles allied to technology tends to make drivers over reliant on the basics....such as the Mk 1 eyeball and actually driving the car, not sitting in, pushing buttons as "the car does everything ".
One thing that would help safety is....Education. They may seem antiquated in terms of speech, but, many of those old Public Information films could, and should, be reinstated. Preferably with some graphic images as to what happens to the human body when stupidity overcomes safe driving practices.
Speed is a contributory factor but really, there's no need for speed limiters as we all have one built in....called our right foot.
Motorways are comparatively safe, apart from (not so) smart sections with no hard shoulder...these do concern me when I'm driving on them. The worst tend to be rural A and B roads, rarely policed, which some people assume are there personal racing tracks.
Germany, quite rightly, has been mentioned. German traffic laws are absolute, there's no abiguity....STOP means STOP. not casually trundle onto the crossing road and the Priority road designation is a positive benefit in this respect.
The principal difference between the UK and Germany is cultural allied to training drivers.