Did you actually read that link before you posted it? On that list there are sites hosted by companies based in Cyprus (xHamster), the Netherlands (booking.com), Poland (onet.pl, xnxx), and the UK (BBC).
It may surprise you to learn that all of those countries are, in fact, in Europe.
2 out of the top 100 come from Europe. Good job.
Well maybe this is the reason Europe's software is not generally competitive? If Europe discriminates against the sale of its own software, it's no wonder.
It's like Europe claiming sole credit for the invention of the PC because Alan Turing was British even though Americans invented the integrated circuit and actually built the first viable PCs.
I'm not backtracking on that argument.
OP made a poor attempt to excuse Europe's lack of competitiveness in the software/web tech scene by waving their hands and saying "We invented all of it" (which is highly debatable). Claiming that Europe invented the web because HTTP came out of CERN and some European person envisioned a global network is bogus. Those are only tiny parts of what make up "the web". You conveniently sweep ARPANET, TCP/IP, and other core web technologies under the rug.
American ignorance at its finest.
[1] https://en.wikipedia.org/wiki/List_of_most_popular_websites
Edit: Downvote all you want. I'll redact my statement if someone can show me that Europe does not suck at making web tech. But you can't, because Europe is not competitive in the web tech scene. I don't know why, but that's the way it currently is.