I use nostros personally. Except for when I want to view a thread that was reposted, then I'll go to amethyst.

https://github.com/KoalaSat/nostros

So nostros shows you which relays a note came from and so just remove relays that showed you what you don't like.

It also has control over which relays deliver global notes specifically since you may still want certain relays to see what your contacts are posting