Is GDP or even GDP PPP an accurate benchmark for comparing countries economies and the standard of living of individuals there?

I recently discovered that service prices are ridiculously high there, which made me wonder if the US economy is over-inflated (given that its largest economic sector offers the same services as other countries, but at much higher prices) or I'm missing something ?

I know that the US economy is undoubtedly the strongest, or at least the second strongest, in the world after China, but per capita income seems very high compared to the cost of living i hear about there.

The price difference between the US and, for example, European countries seems enormous, not to mention the lack of free healthcare or education in the US.

The GDP PPP is supposed to solve that problem, but it barely makes any difference to European economies, leading you to believe that the cost of living there is very close to that of the US, which doesn't seem to be true.

For example, even in terms of GDP PPP per capita, the United States surpasses the United Arab Emirates, but is the American citizen really richer than the citizen in the United Arab Emirates who does not pay taxes, receives free healthcare and education, and where prices in his country are much cheaper?