The US became too prosperous, too fast. They're an example for other countries to learn from in their own development - emulate the good parts, avoid the bad. In Eastern Europe smart phones are just starting to become commonplace and people are already aware of how harmful they are, parents especially. The US does have one huge advantage the other countries don't though.
> I can't really tell what's true anymore
This is by design, and politics is just stagecraft meant to hypnotize the masses, distract and confuse them.
Reality is indeed more complicated than you and I can fathom, which makes it ironic that there is always a knee-jerk reaction to tragedies, usually by politically opportunist leftists who want to take away guns and free speech. The reality is that these were individuals who allowed themselves to be taken over by demons. They willingly forfeited their own sovereignty. To what degree society is culpable is unknown, and large-scale attempts to curtail the devil, performed with an impetuous lack of prudence, serve only to make him stronger.
That's the problem with leftists in censorship discussions - they fundamentally don't believe in free will. It's not the website that shot people. It wasn't Trump. It was the individual. Believing otherwise is highly problematic as it leads to authoritarianism.