As a Europoor it's sad seeing my young nephew growing up, and realising he will have far better opportunities in the US or China than here, where everything is blocked, taxed and regulated to maintain the status quo.
Those two countries have far worse inequality than most countries in Europe. So yes, he might have better opportunities in US and China, but that's because he was born in Europe and will be in a better position to choose his future than if he had been born in a country where the inequality level meant he could not access the opportunities available in that country. You need to think about why those countries have better opportunities in the first place. They paid a price for that.
There is inequality because they have more super rich people, whereas in Europe there is less inequality but everyone is poorer. This is why inequality is a pointless argument.
Not quite, they also have more poor people to a scale that doesn't exist in many countries in Europe.
A consequence of having more poor people: strain on the healthcare and justice systems (relatively more acutely ill people, relatively more people committing crime) and bad educational outcomes (poor people tend to score lower).
A consequence of having more rich people: democratic processes are regularly under pressure due to the influence of rich people trying to make more favourable processes. Government institutions getting swayed by money from these rich people in exchange for preferable treatment.
The USA certainly have the "best" (according to some metrics) economy in the world, but the reasons are complex, diverse, and mainly historical.
I will concede that some areas see fewer regulations, leading to a leaner permitting process (though it has consequences on road safety, environment pollution and gun safety, for instance).
However, it is hard to predict the future, and I am unsure if your last point will stand the test of time. For instance, if/when the AI bubble pop, the USA job market will probably suffer more than others. It is tempting to always see greener grass elsewhere, but Europe isn't in such a bad position compared to the USA.