I respectfully disagree. For better or for worse, Trump was the President of the United States. Yes, Biden won the election, but nearly 47% of the vote went to Trump. How do you think the conservative (and even not-so conservative) part of the electorate would have reacted if Trump was kicked off Twitter before the election?

While Trump is technically still POTUS, he is now seen as trying to undermine the rightful, peaceful transition of power to the next president, and what's important is that viewpoint is not only believed by the left, but now huge swaths of politicians and the electorate who at least gave Trump tacit support.