Mental healthcare is a different story, but it's not any better with private insurance. Every therapist or psychiatrist in the insurance racketeer's provider directory is either dead, moved out of state, or not taking patients. "Ghost networks," they're called...
The worst insurance I've ever had was at a FANG, via United Healthcare. It covered nothing. Hardly anyone accepted it, apart from the on-site health clinic. It was worse than a university health plan, for god's sake. As to quality, you say it's the best in the world, but the fact that the US now has a life expectancy lower than China, Cuba, and Albania determines that this is a lie.
Unpopular truth on this forum: the healthcare system in this country is owned and operated by organized crime entities. It is completely illegitimate. It consumes 19% of GDP of the richest country on the planet, and Americans are some of the least healthy people outside of active war zones. Unless you're using your doctor as your Xanax dealer (John Mulaney explains how that hustle works: https://www.tiktok.com/@funkytownmc/video/722624028419819447...), this system sucks for you too.
I would be shocked if the Mexican cartels weren't deeply involved with United Healthcare and all these other corporate gangsters. This industry is the greatest crime of all time.