Only that you did not make that decision.
You personally (I hope :) ) did not do it.
Then you could say it was we as in we the voters, or we the people. But I dont think there was any serious debate about social media censorship prior to the elections.
That menas that some people made the decision without direct democratic legitimisation. Maybe they can claim an indirect legitimacy, I dont know that because I dont know to which degree the state is involved in this.
@gomeravibz points out the problem. Any decision taken will be arbitrary to some degree. There are so many questions now that need to be answered regarding future cases. Otherwise we find ourselves in a system of censorship where people can be censored not following strict open rules, but based on random criteria. From there it is only one more step to silencing opposition as desired.
Once you create a central authority you need to make sure that authority is kept in control. And it rarely is. Central authority is a major weak point for failure and corruption. In the end I believe that it is best if these central points of control do not exist at all.