Some inconsiderate people ride bikes and some drive cars! Some do both.
I do quite a lot of leisure cycling but do not find it enjoyable sharing busy roads with cars. Fortunately we have quite a few miles of cycle paths and (bumpy) canal paths nearby.
There is a section of road with a dedicated cycle path running alongside I use quite often. The road has double white lines in the centre and a white line each side about 1 metre from the kerb. I was cycling along one day when I saw a bike approaching, not on the cycle path but on the road. Not only on the road, and not even inside the white line next to the kerb, but about 1 meter outside it such that the following cars could not overtake and were queued up behind!
On another route I use in Colwyn Bay there is a cycle path running along the prom. Pedestrians walk across this haphazardly, parked cars overhang it and in places fishermen block it with rods and tackle. One day I was almost doored passing a car with various fishing accoutrements alongside. Another hazard is dogs on extending leads. In the end you give up and go on the road with the cars.
We live near the Welsh border, and Wales being a popular place for the Lycra lads they travel in clusters 2 and 3 abreast on Sundays, making no attempt to ease the flow of traffic. I’m sure that most of these must also be drivers and I can’t understand why they do this.
In my car one day I was sitting at the traffic lights when a cyclist came up the inside and his pedal caught on the inside of my front wheel arch, causing considerable damage. Waste of time trying to get any recompense.
Many roads have a cycle lane each side, but these lanes often disappear when needed most - coming up to traffic lights. Yet, in other places the bikes have a box right at the front of the cars in the traffic light queue, a good recipe for causing grief between cyclists and drivers!
Before we moved I was fortunate enough to be able to cycle to work every day. However, this necessitated using a roundabout above the M53 where the road markings gave no thought to cyclists, as you had to cross the exit leading down on the slip road to the motorway and motorists thought that bikes had no right to traverse it!
I wish cyclists and drivers would be more considerate of each other, and road planners could understand the needs of cyclists more.