I know that there are more issues: not all the participants are ever visible. Any given conversations may have just a few active participants and several silent ones. This creates a fundamental malfunction in the social system and gives the oddballs the opportunity to dominate the space in a way that would be much harder to do offline. The audience is present but in an invisible way. The tyranny of the hatemonger results from the lack of response.
I know that there are huge problems with communication on social platforms. There are the people with a preset interpretative model. There are the narcissists who talk but never listen, the one-point-of-view experts who advocate their solution to all problems and the people who insist on bringing all conversations round to their particular issue.