What about tor?
And what if you own a relay?
Discussion
It's good for encrypted traffic, but around 2017 someone says that most nodes were owned by NSA, so, for me is not the best solution, and not even a miracle solution.
Yes, Tor have some problem, nodes funded by NSA or CIA is one but constant DDoS is one other for the performance
I wouldn't rely on Tor in order to expect high level of protection, for browsing Nostr it could be good enough (as always it depend on what you're doing)