Unfiltered, anonymous speech on major social media platforms is the equivalent of a supervirus. Bad, poisonous ideas spread more quickly than truth and logic can catch up, and no one is silenced or held to account when these bad ideas keep spreading.
I don't know what the solution to organized disinformation is. I don't know if the "cure" would be worse than the disease of disinformation. But it's naive to think nation-states are not using social media to leverage peoples' negative emotions and dividing society and making people disrespect really important things that should be held in really high regard in society, like truth and science.