Aside from the fact that booking.com is a Dutch company (although Booking Holding is US, so who the hell knows any more as I have no idea how that all fits together...), no one is forcing anyone to do business in Europe. If you don't like the rules then don't play; that's fine, no hard feelings.

That's how it works everywhere, including in the US.

What you DON'T get to do is set the rules for OUR countries. Several of these companies have been under the misapprehension that's how things work, and they are being (slowly) cured of that delusion (far too late, but better late than never...)