> It's trivial to bulldoze a European start-up by having complaints filed in a bunch of jurisdictions alleging this or that nonsense.
You vastly overestimate the responsiveness of data protection authorities. Your complaints will be filed and requests be sent in what, months? Certainly not all at once; and for pretty much all requests, even a small startup will have general answers prepared (or can make them up) they can send out immediately, with clarifications sent later.
Edit: And that's even glossing over the fact that for your bulldozing, you'll have to research how to report your "nonsense" for each individual jurisdiction, in that country's language; and I'd be surprised if they wouldn't want to know which citizen encountered the privacy violation you're trying to report; the people working there aren't stupid, either. All that is to say: I've yet to see such a trivial bulldozing happen.