I would argue complacency + selfishness + a small amount of ignorance. Some people really do not know that you shouldn’t get in the left lane unless you plan to

I would argue complacency + selfishness + a small amount of ignorance. Some people really do not know that you shouldn’t get in the left lane unless you plan to pass a vehicle or want to drive faster than your current lane. A lot of people know you shouldn’t tailgate or cut people off or smash the accelerator just so you can smash the brakes 10 seconds later when you get to the red light or stopped traffic that was clearly visible, but don’t give a shit because when they’re in control of a car they feel entitled to drive however the hell they want.