Two examples:
1. "Police violence." What violence? Against whom? In a year approximately 50 million people have a police interaction (not the total number of all interactions). About 75,000 people are taken to a hospital following police use of force and about 600 people (0.001%) are killed. Of course the ideal number is zero but 0.001% doesn't seem like there is an epidemic of police violence sweeping through the country.
2. "Alternative (public) transportation." Again you're not being particularly clear on what the fix is here. Most major cities have some form of transit, be it busses, subways, or above-ground rail. If you're talking about major city-to-city high speed rail an LA-to-NYC rail system would be like putting in rail from Paris to northern Kazakhstan. San Diego to Chicago would be like London to Kazan (845km east of Moscow). Iowa is a medium-sized state most in the US never visit and never think about, and it's almost twice the size of Austria. Europeans who rail (pun intended) about how it's so dumb the US doesn't have high speed rail haven't taken the requisite 5 minutes to understand the difference in scale when you're talking about connecting the east and west coasts of the US.
What's more likely? That the US with ~350 million people just decides to ignore these "issues," or that there's something the average person who doesn't live here is misunderstanding?