Maybe the individual galactic factions are hive minds, but what guarantees that those hive minds are in turn going to get along with each other and not just rec

Maybe the individual galactic factions are hive minds, but what guarantees that those hive minds are in turn going to get along with each other and not just recreate individual human disagreements and pathologies on an interstellar scale? Perhaps the reason we've never picked up any transmissions from aliens is that all the hive minds have blocked each other on Interstellar Twitter for publicly thinking something offensive fifty million years ago.