(Hot take alert)
I personally think mass protests should be brought back. Many governments around the world are rejecting democracy and so can really only be held accountable with drastic measures. I'd even argue people should be armed and follow domething like in the Charlottesville gun rallies or the 1968 DNC riots as a model for protesting particularly egregious stuff like Trump's impeachment trial. A few hundred thousand armed people pointing at the US Senate saying 'A trial without witnesses is unconstitutional, the president is not above the law' would definitely send a message to the Republicans there and watching in FOX.