On the side of where all the internet platforms are from, it is the US that's relevant. Maybe it's not a coincidence that the EU doesn't produce many internet platforms that are good?
And you attribute this to regulations rather than the ground truth that the EU is a hodge-podge of very different cultures, countries, languages and laws that only recently implemented a shared currency, and is totally unlike the huge, wealthy and comparably homogenous market that is the USA?