Public transport in the U.S is tricky. Half of the population probably is rural, and the U.S is very spread out which greatly increases the costs. American cities were also just built around cars. The car was like the most American invention ever for a long time outside of the firearm which made everyone equal in a way. Cars were sort of the thing Americans liked because it represented autonomy and freedom to people who were mostly stuck living with other people, and Americans traditionally being the most liberal, but also innovative culture, tended to butt heads a lot and needed personal space.
European cities were built in a time when people walked mostly, and are laid out to be compact and narrow. The entire EU is like the size of the U.S maybe even less. The population is much more urban. They have urban zoning, so you have houses mixed in with shops and industry where in the U.S you have HOAs, suburbs, parking lots, and dozen of miles of flat and sparsely populated cities with distances of hundreds of miles between large urban areas. Americans are also obsessed with material things and want to work long hours so traveling for work is harder.
Trump being dumb, wants to force Americans to buy shitty American cars. There is a reason nobody buys them, they are junk. They break, are a ripoff, they drink gas, even the small cars. They are slow and dangerous, and likely won't even last until they are paid off.
Without cars, many people have become desolate. Entire families have been made barren. It's kind of too late to fix it.