Tor network is still very slow. A DDoS attack is still being performed.
Too difficult to implement. I guess it’s just an ordinary TCP SYN flood attack from outside of Tor. There was an issue here some years ago:
A relay operator discovered many incoming connections to his relay from Hetzner AS. He set up his relay on top of Windows OS though.
I think that Tor relay operators should set up their relays under FreeBSD and set up firewall rules as it described here:
Also they should turn on SYN cache which is available on FreeBSD but not on Linux.
https://man.freebsd.org/cgi/man.cgi?query=syncache&sektion=4&manpath=FreeBSD+14.0-RELEASE+and+Ports