You can get rid of that one just by adding randomuser.me to your muted words, since all of those use that same as their profile image source.
Discussion
i have no idea how to add that on nostr:npub1n0stur7q092gyverzc2wfc00e8egkrdnnqq3alhv7p072u89m5es5mk6h0
Not all clients support muting particular words, so the "just do this simple thing," isn't always an option.