This is simply not true. There is freedom of movement for workers which means it's easy to recruit top talent across the continent. Remote work is also much simplified. There's no friction moving goods and company assets across borders. The regulatory environment is significantly unified under the EU so there are few regulatory risks for companies growing outside their country within the region. Every EU company also has access to the entire continent's consumer base – 450 million residents, which is 50% more than the US.
This benefits many EU tech companies – Spotify, Revolut, Klarna, Bolt Mobility, Wise, N26, and so on and on and on.
> EU citizens like American companies
As an EU citizen, I don't bank with an American company, I don't drive an American car, I don't shop in American grocery stores nor is importing many American foods allowed on safety grounds, I don't buy American fuel, my private health insurance isn't American, and so on and forth. I only buy American tech where there isn't a more competitive Chinese alternative. I'm not against the US in any way, shape or form. I just don't think we think about the US in the EU as much as you think.
You are right in the sense that the European way of life is very different from the US way of life and we don't care that much for the economy. Yet Europe is still home to some of the largest stock markets in the world including LSE, Euronext, FSE, SIX Swiss, etc. We just don't value it as highly as other aspects in life – there is a strong sentiment of rejection of the rat race, growth of shareholder value at all costs, and other such American things in Europe.
Perhaps it would benefit you to first examine the evidence on the ground, and then re-evaluate if your belief in American values (which I respect – totally great values in many cases) blinds you to European culture around capitalism. Europe is quite socialist, after all. Naturally, less effort will be spent on capital, more on society.