Except all these things can be trivially forked. If you don't like how the VC one is doing things, just fork it. There are a billion forks of everything in the crypto space, for exactly this reason.
yes, when was the last time you see google chrome forked and adopted a large user base? That is event with big VC money behind it Brave for example. Open source is now days used a marketing scheme to attract developers to work for free, and attract user to think that is open.
Facebook wasn't the first social network. Not even close. Facebook succeeded because it did very similar things to the prior ones, but a little bit better than them in just the right ways. That is the essence of a fork.