Cleaning up the galaxy takes quite a while, since our personnel only consists of Myself, Jashin, Thea, and Victor. 4 people. 5 if we count Gaidos who's battering everything and shooting everything in sight using the laser on the ship. Due to the difference in number, we lack the speed to clear up the legion personnel.
Due to Dixon being defeated already, it's easier for us to clean them up because their mood has plummeted to the point where they couldn't really do anything anymore. They're just doing stuff for the sake of doing it. Not really any goal in sight for them...
Eventually, after a grueling 10 hours of cleaning up due to the pesky movement they did despite having no more Dixon... Everything is cleaned up...