Yes appreciate that however something needs to be done and neither social media companies or governments are doing anywhere near enough.
Might be too simplistic but this is the change that I think is needed.
At present the SM companies get away with branding themselves as telephone style companies meaning that they take the position that what people say to each other is not their immediate problem.
Treat them like newspapers and make them responsible for the content. Give them a due diligence defence with a short period to correct/ remove posts. This would drive accountability, limit bots and likely remove the majority of anonymous accounts