Maybe temporarily block all AWS: https://docs.aws.amazon.com/vpc/latest/userguide/aws-ip-ranges.html You may be blocking some good relays, but not all of them. And certainly not clients. You could then whitelist specific relays. Eh?
A lesson in humility and problem solving here. #cypherpunk nostr:note10xxafxj0h8yc4wq2ukjrdaasek9gandu6qu9ngnsdy8qk3dmf2jqcnchmj