The loss of hope, increase of fear and panic were always accompanied by rage. Wuornos' act of admitting defeat caused public opinion to explode.
They had been looking forward to the three Universal Civilizations sending someone to break Black Star's arrogance. However, reality shattered their illusion. No one could defeat Black Star. The many galactic residents were both afraid and angry, then their humiliation turned into rage.
Okay, you're strong as a person, no one in the three Universal Civilizations can match up to you. But we still have fleets; we still have armies! I don't believe we can't deal with you!
Since the three Universal Civilizations had lost in terms of individual power, tons of galactic residents turned to believe in the three Universal Civilizations' collective strength. They found a new excuse to convince themselves and took it as a new source of confidence.