Except all the regs these leeches are whining about only apply to them, not small startups, not because they are foreign, but because they are big. Even if the law itself does not only explicitly apply to huge companies, like the DMA that Apple is whining about, enforcement heavily skews against the big ones breaking the most laws.
And the reason they got big was not an unregulated business landscape, but tons of VC money pumped into ventures that would never have been able to simultaneously attract customers and make money. It was literally the same as the current Chinese situation with BYD, foreign country is dumping the market, killing local competition because they can afford to have a better service, because they have unlimited money.
Every single EU country had their own small social media company that was akin to MySpace. Every one of them got outcompeted by Facebook, since they had unlimited VC money. And now Facebook is one of the two notable ad companies in Europe, the other being Google, extracting all the money from the continent they possibly can, while breaking all the laws they possibly can.