My observation would be that driving skills in general are poor. Forward planning, and being aware of surroundings are equally deficient. As others have said there is a lot of inappropriate use of speed too. Just the other day I sat watching drivers in a supermarket car park and was amazed at how fast people drove.
A golfing mate was hit by a car in our Asda car park a few days ago. He has leg and head injuries. His head hit the windscreen and cracked it so a significant blow. No witnesses and police are investigating. The driver did stop. No major onjuries but nasty enough.
Driving standards these days are poorer.
Roads have more traffic yet drivers are less sensible, tailgating, not indicating, in a hurry, selfish. Luckily I rarely drive in big cities where it is worse.
Slow drivers in our rural area are a nuisance though. Some like tractors, are to be expected and they tend to pull off the road. It is the inconsiderate, nervous, deliberate ones that are a problem.