Earlier quoted context omitted.
Which metrics are those? Things don’t look great for the poorest Americans, but the average American isn’t living a life that’s even remotely third world.
Childbirth mortality, lifespan-healthspan, murder rate, paid vacation, worked hours per year, job security, etc.
I can't find any info about paid vacation by country. Everyone wants to talk about legislated minimums, which doesn't tell the whole story. The US legal minimum is zero, but the average is definitely not zero. The top country by that metric is Iran, and some other countries near the top of the list include Cambodia, Burkina Faso, and Niger. Overall it appears to correlate very poorly with first-worldness.
Worked hours per year, the US is at around the same level as countries such as Italy, Australia, and Ireland, and substantially lower than places like Greece, Poland, and Taiwan.
Job security also appears to be on the same level as peers. According to https://www.worldatlas.com/articles/oecd-countries-by-job-se..., the US is a bit worse than Denmark and New Zealand, and a bit better than Ireland and Finland.
I'm not seeing it.