bitcoind – Can satoshi nakamoto change bitcoin

If I understand correctly, Satoshi Nakamoto (or any cryptocurrency creator) can change things in Bitcoin, like supply limit, halving, etc.
My question is: How is Bitcoin decentralized if Satoshi Nakamoto can change anything in Bitcoin protocol?
What if suddenly Satoshi Nakamoto changes Bitcoin so miners receive 100 times more rewards. How can I, as a Bitcoin user, prevent this to happen?