Even though Blockchain is tagged as " Decentralized", wouldn't the organization actually implementing the Blockchain like Ethereum control it? For example, If I were a business that would want to use the Ethereum Blockchain technology to shift my business to Blockchain, wouldn't Ethereum be in control of the actual underlying Blockchain technology? Wouldn't it have the power to for example change the consensus algorithm or change the underlying technology? If I am missing something here please explain.
"Decentralized" is really a hybrid of distributed and centralized: