Europe is better for the rich too, just not for getting even richer. The rich in EU are having great time, there are many hot spots for the billionaire class as well as the other less rich but still wealthy. They only complain about how they can't do whatever they want to the workers and the nature.

Europe is also fine for startups, its just not good for scale ups. When successful with tech and the product, startups go to the USA to try to become gargantuan(which also affects the startups, because investors are less motivated to bet on them becoming scale-ups).