Decentralized doesn't capture what you want it to mean anyways. When crypto people say decentralized, they don't mean AWS edge locations or The Federal Reserve Central Bank which are both decentralized. How about we start saying exactly what we mean?

"Non-excludable" captures the important aspect. It doesn't matter if your network is decentralized if it can't maintain this feature. Bitcoin being non-excludable implies that it is secure in terms of consensus control - even if a powerful agent is out to exclude you from the network, they would fail. That is the core property and it leaves no room to hide behind as a buzzword; it means exactly what it means.