Though Voldemort was unwilling to admit it from the bottom of his heart, he had indeed fallen into a disadvantage in his clash with Albert. The absurdly young man before him felt even more dangerous than Dumbledore had in his day.
If this continued, defeat was only a matter of time.
Yet Voldemort refused to believe that he would lose, because he could use Apparition to leave at any time, and Albert Anderson had no way to stop him.
But Voldemort did not want to do that, because being forced to flee was a disgrace to him.
He only needed to hold on a little longer!
Perhaps Snape would return with the other Death Eaters. Then, they might be able to leave that detestable fellow before him here forever.
What Voldemort did not know was that he was destined never to receive reinforcements.
After learning about the headquarters from Snape, Yaxley had immediately dismissed the idea of taking people back to aid Voldemort. Instead, he chose to intercept the Auror Alliance, which had never existed in the first place.
The reason was simple: they all believed Voldemort could not lose, and even if they returned with reinforcements, they probably would not be able to catch that Mudblood.
Instead, they might fall into that fellow's scheme and lose their best chance to stop the Auror Alliance.
Since Voldemort could not lose, their focus naturally ought to be on the Auror Alliance, which could pose a major threat to them, rather than allowing them to join forces with the Order of the Phoenix. Otherwise, they would pay an even greater price.
This decision won the approval of the vast majority of Death Eaters.
In truth, even if the Death Eaters had gone back to reinforce him, they would not necessarily have held