webrtc is a fairly bad start because it cannot establish connections to known endpoints (think address:port) or speak multicast for local neighbor discovery in a p2p network.

it generally relies on a signalling server or at a minimum on an exchange of one-time session tokens the user could enter for each connection.

it's not distributed and barely decentralized. it's more geared around a client-server approach where some of the traffic is offloaded to peer-peer connections.

compared to protocols like tcp and udp it's incredibly crippled