By now every piece of software and hardware that is in use, every abstraction layer in that computing tower of bable has been thoroughly hacked. Anywhere from plaintext passwords on a server to insane exploits like Rowhammer, those security websites and podcasts have long weekly litanies of tragedy. Additionally there is all-knowing Google, chinese phones phoning home, undocumented functions in intel processors, ISPs sabotaging user encryption, small-time browser plugin writers that get offered high sums for their plugin to get a front row seat to users' browsers, programmers pulling who-knows-what from npm and are probably pwned by time they write 'hello world', phishing, billions of smart devices constantly listening and often filming and we probably only know 10% of what's going on until a Snowden 2.0 comes along.
Yes, all of it is 'fundamentally flawed', and it would take a herculean effort to start over with a clean slate, yes, to figuratively burn it all down and make simple provably correct and safe hardware and a small and minimal OS that has browsing and communications built in.
Anyone?