A few things.
I work out in the sticks. loads of people have started constantly driving in the middle of the road. Lunging over to their side as soon as they see someone coming the other way.... sometimes they only just make it over in time. I get that the roads are a mess with pot holes everywhere, but its getting a bit ridiculous now.
A few years back, i was driving along the A428/A14 towards Newmarket i cant remember where exactly, but i think it was where the A14 "merges" with the A428 and carries on as the A14, but it might have been at a junction further up. Strangely, traffic was light, i was in lane 1. I saw another car, in lane 2 of his road (for no apparent reason), wanting to merge into my lane. he was looking over his shoulder, gesturing to me that i should move over to let him out. Now only lane 2 of his road merged with lane 1 of mine, lane 1 of his road just carried on along side my road. there was nothing in his lane 1, but rather just moving into his lane 1, where he should have been anyway, he expected me to move. I didnt, and he hit the brakes and pulled straight in behind me. These days i'd just move over, but at the time i had a long commute and i was so fed up with all the stupidness.
A few months ago, i was at the Biggleswade A1 rounderbout here:
map I'm coming from the golf shop direction and going straight over. The single carriageway road spilits into two lanes, right at the rounderbout, so i'm in the left lane. Its not easy to get out, because its A1 traffic so its a pretty steady stream. If your turning left it isnt too bad as you can just blast it, but going straight over, you need two clear lanes, and if you go too fast, then your going pretty fast onto the southbound A1 traffic. You get quite the queue of traffic here sometimes. I dont remember it being particularly bad this day. I'd only just got to the rounderbout, and was awaiting a gap in the traffic. i hadnt been there long, when an Audi Qsomething or other pulled in to the right hand lane, and he wanted to go left!?! so he thought, rather than just wait his ******* turn he would just cut straight in front of me. as it happens, i moved slightly before him. so he nailed it, then had to brake hard, then negotiate around me... right knob.
There is plenty that annoys me on the road. Mono-speeders (40-45 mph everywhere), people who cant accelerate on a slip road to an appropriate speed to meet the traffic. People who just indicate and pull out to overtake on a motorway, regardless of how much it causes the traffic to slow down to let them out, because they are coming out anyway... this didnt happen in my day. When i was a lot younger (i'm 44 now) i used to drive everywhere as quickly as i can, but there was always a rule that you wouldnt cause people to have to brake if you change lanes. so if you did pull in front (ish) of someone, you'd put your foot down. Now no one cares. they want to pull out, so F everyone else.
The best thing i did was to change jobs with a much shorter commute. 40 miles each way to 7 miles each way. It all winds me up a lot less now.