@thetechtutor Not sure who told you the www originated at DARPA, not at CERN. Once again: internet ≠ www.
The www was not "designed to be open". That's precisely why it became what it is. HTTP was the only piece of design, the rest of Berners-Lee's work was merely suggestions or wishes, see https://www.w3.org/History/1989/proposal.html
What we got in 1994 was the W3C, an organization that tried to integrate proprietary stuff (like DRM) that corporations added to the www, and is now dominated by them. (1/2)