The last thing the Democrats wanted was to have a witness situation wherein in order to get Bolton they would have to give up Joe and Hunter Biden and possibly even Schiff. Schumer gave that away in at least two interviews. But once they were sure witness approval was not going to happen they went all in on blasting the decision and decrying that now a resulting acquittal would not be "valid" due to the absence of witnesses. That was the absolute best they could hope for - a plausible reason (to them anyway) to explain away the outcome. There may be a few of the faithful who will buy that but most people saw this ploy for exactly what it was. Like the kid that murdered his parents and then begged for mercy because he was an orphans. Incompetence at almost laughable levels.