Four of the 28 EU member states have a higher rate of infant mortality than the US average - Croatia (9.3), Romania (9.4), Bulgaria (8.4) and Cyprus (7.9). The first three are ex-communist countries and have only been democracies since the early 1990s.
25% of the Croatian economy was destroyed in the Croatian War of Independence of 1991 to 1995; it still has a number of active minefields. Romania was utterly brutalised by the Ceaușescu regime until 1989; you may dimly remember the horror of Ceaușescu's orphanages. If you don't, I suggest you steel yourself and have a stiff drink before Googling it. Bulgaria has a GDP per capita of just over $8,000 - a quarter of the GDP per capita of the poorest US state.
Cyprus suffered a coup d'etat by Greece and an invasion by Turkey in 1974, creating a lasting political division. There was a wall separating the Greek and Turkish sides of the island until 2007 and UN peacekeepers still maintain a demilitarized buffer zone.
That's what we're dealing with in the EU. Those are our excuses. What are yours?
https://www.cia.gov/library/publications/the-world-factbook/...
I'll echo GP's statement. America isn't perfect, but from the many countries I've visited (and with the many challenges that the US has to face), it's "The Greatest Country In the World".