It's sad to see what's happened to the Hugo Awards, but I don't think this is right:
The Hugos are a victim not of social media, but of highly motivated bad actors. Their problem is that they're just too small.
The Hugos are an entirely amateur affair. A few thousand science fiction fans vote each year for best novel, best film, and so forth, and then show up at the World Science Fiction Convention where the winners are announced. A famous author is corralled into hosting, and when it's over everyone heads back to their rooms for a night of riotous filking. Just a bunch of nerds having some nerdy fun every year.
Decades ago these fans made a deliberate decision to stay small and cozy (unlike the San Diego Comic Con), and recently that's come back to bite. The problem with being small is that you can be easily attacked by a fanatic with a beef. So Vox Day and his crew of sad puppies were able to mount an effective sabotage of the awards several years ago with only a few hundred committed followers. Then, in 2021, a group in Chengdu, China, was able to land the 2023 convention site because it doesn't really take many votes to win the competition. It's not like becoming the host city for the Olympics.
It's still not 100% clear what happened at the Chengdu convention, but some combination of inexperience, cowardice, and fear of Chinese government pressure caused the organizers to rig the voting to prevent any politically disfavored writers from appearing on the ballot. In the end, it was clear that the entire vote was fraudulent, and knowingly so.
It would be remarkable if the Chinese government really cared enough about a tiny fan convention to pressure the organizers, but that's not really at the heart of what happened. Too many people have discovered that the Hugos are small enough to be easily manipulated and (just barely) large enough and prestigious enough to be worth it.
It's a damn shame. For chrissake, people, it's a few thousand nerds who get together each year for a little fun. Just leave them alone and peddle your deranged political bullshit elsewhere. It's not like there's a lack of outlets for this stuff.