They absolutely did not. But even if that were true, how does that excuse this awful behavior?
too bad you cant talk to Berners-lee and the original DARPA crew about this
What exactly did they built? AFAIK, even search engines already existed when they entered the game(they just did it better). The fundamental protocols that makes the web work weren't invented by them. What made you think "they built the web"?
They do somewhat control the fundamental elements that make the web work. Blink/V8 is obviously more powerful than Webkit, Gecko, as far as the market is concerned.
If Blink and Google both implement a feature it becomes a defacto web standard.