I badly want better urban design in the US, focused on walking, biking, and public transit - but we have to understand and deal with the fact that good people are raised in a very different environment, and that it truly is quite difficult in a great many places that people live to simply change your lifestyle to one without a car. You have to meet people where they are. Show them a better way, and be understanding when they resist and say it won’t work, because they have only known a different way.
I have seen many people who are receptive to these ideas, but have been so put off by the insulting attitude of many notable proponents (like NotJustBikes) that they are wary of engaging with it.
You are justified in your anger at the situation. I get angry all the time at the risk, pollution, expense, and lack of amenities that I must bear due to the car-centric design of America. Still, that does not make hostility an effective strategy. We will make change by showing a better way, not by denigrating and insulting.