Miners own mining, they don't own Bitcoin's protocol or Bitcoin network or Bitcoin community. Miners don't influence the price in any special way, and there's also no solid proof that anyone successfully manipulates the price on a large scale, it's just rumors of frustrated traders who lose their money doing bad trades.
Bitcoin is still the most decentralized cryptocurrency, because it has the biggest network and community and the most decentralized development with hundreds of contributors.
One of the main reasons why bitcoin and crypto users have stopped using it is because of misinformation and misinterpretation of what's happening inside the cryptoworld. If we read more articles about it, we will be more knowledgeable and there will be no more confusions regarding this topic.
To clear things out, bitcoin is decentralized and there is no way that those miners will have control of it.