It's no secret that in today's world, big companies like Google, Facebook, and even Amazon control the Internet.
Can you elaborate? As I know, the Internet network is still largely decentralized, and thanks to tools like encryption, ToR, VPN, proxies it's impossible to control users. It's impossible to make a "turn Bitcoin off" button, so I wouldn't worry about it. There are problems with lack of competition between Internet service providers in some places, but it doesn't have any strong implications for Bitcoin.
I agree with hatshepsut93 (wow that's hard to write).
Internet is still a place largely decentralized
We have bitcoin, we have independent news sites, anyone can open a blog for free and say whatever he wants with no censorship (mostly)... internet is so large and so vast that nobody can control it.
Internet is just a bunch of connected computers, almost all computers in the world. That's just amazing.
However there are some services in the internet which are oligopolies (mostly due to their own merits by the way).
For example, the advertising online industry is an oligopoly controlled by Google Facebook and maybe one or more companies. But we cannot say internet is centralized imo