No, this is wrong. If only 15 nodes controlled Bitcoin, they could unilaterally come together to change the rules of the network. This has been proven to not be possible, because there are actually hundreds of thousands of nodes.

The people who thought “we can do better” because they didn’t understand the importance of block validation and decentralization went and forked off and created BCash. I suggest you use that if you’re unhappy by the realities imposed by the Bitcoin network.