As politely as possible, your experience is simply wrong, I'm afraid to say. US angel/seed round investing by EU-resident HNWs alone exceeds all angel/seed investing in the EU, by quite some margin.

I'm actually quite curious who it is you think are people in the EU deploying capital in early stage investments, as you appear to be very confident?

I suspect maybe you're thinking of people investing in EU startups to avail of the myriad tax incentives like Germany's INVEST, Ireland's EIIS, etc. If so, then that represents a tiny fraction of capital invested by EU HNWs in early stage companies.