I like the equality, free healthcare, and decent holidays that Europe offers amongst other things. I am considering starting my own business.

There is no "free". someone is paying for this, and this someone is you through taxes, but most of it is the companies taxes in Spain.

This makes small businesses lives in Spain hard, and make big corporates think twice before getting real big centers in Spain.

This lack of competition is the reason you need to consider moving to US to have a good chance of a better life.

More money yes, better life is debatable. I moved from the UK to here, where it is generally better paid (not by a huge amount outside of London), but I feel I have a better quality of life in Spain.

Only works if you ignore other European nations that have both the benefits and better jobs.

If you are smart and capable, the US is THE best place to be. If you aren't (and enjoy government financial support) the US is not the best place.

This is why Musk, Thiel, et al. moved to the US.

"If you are smart and capable, the US is THE best place to be."

I think this is generally true if you are looking for a place that can best leverage your skill sets for maximum financial rewards, and you are willing sacrifice some quality of life in doing so.

"If you aren't (and enjoy government financial support) the US is not the best place."

I suppose this is the part that got you downvoted because it came across snarky. But it's also not entirely true. You can still be very average or somewhat talented in the U.S. and still hold much better paying jobs in the U.S. than you would anywhere else in the world, if you pick the right sector.