Bitcoin is controlled by humans but is not concentrated or managed by a person, organization, or country.
Bitcoin's control is divided equally among everyone who holds it.
Bitcoin is decentralized, created so that everyone can use and control it peer-to-peer instead of being centrally controlled by individuals like the current financial industry.
You're contradicting your statement that bitcoin is controlled by humans with you next statement which is bitcoin not being managed by a person. Also, bitcoin can be controlled by any person, I mean the whales won't exist if they don't have any stake on the market that will be so profitable to them. Yes it sort of doesn't have a central authority but that also means that anyone can get on top.