Why do we as Americans have horrible driving behaviors?

As title states, why do American drivers stink? As someone who works for a German company, and has driven on plenty of European highways including the autobahn, you really start to notice this. Camping in the left lane, not letting faster traffic by, changing lanes without a signal, passing on the right, the list goes on. People need to remind themselves that owning and driving a car is not a right, but a privilege. And this is from someone born and raised in the US

What can we do to help change this? As it seems to be only getting worse