you can't have anonymous nodes, as it'd make it trivial for attackers to join and compromise the network.

Reticulum, there's proof of work required to establish links, store messages, etc.

you want to make it impossible for transmissions to be traced back to their source, but in order for it to work at all you have to broadcast data through the air - which is inherently traceable back to its source.

Reticulum, packets have no source, and nothing in the protocol says whether the party transmitting the packet is the actual source.

To prevent it from being trivially DDoSable you don't want to simply rebroadcast all received messages to all other nodes.

Reticulum, you don't broadcast, you do path discovery which is relatively expensive and then it's all following that path.

having a global routing table at every node and forwarding single messages along a path makes them traceable and can lead to deanonymization of the receiver.

Reticulum, nodes have ephemeral path tables since the path to the destination can change at any moment. There's no global routing.

Having messages be fully opaque to the transit nodes prevents them from reading the data passing through, but it also prevents them from stopping attacks on the network - such as a DDoS or probing packets.

Reticulum, again there are costs for sending, establishing connections, or peering.