That's sadism or something, not Stockholm Syndrome which is about victims forming psychological bonds with their abductors, named so after it happened in Stockholm in 1973.

I think it's less about "like to see someone get beaten" and more "see someone who thought they owned the world and could bully others around, crumble under their own incompetence is satisfying", or something like that. Personally, I think it sucks, but I do understand how others can see it in different light, considering the long history of meddling with others.