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Then standing close beside him gray-eyed Athene said to him: 'Son of Arkeisios, far dearest of all my companions, make your prayer to the gray-eyed girl and to Zeus her father, then quickly balance your far-shadowing spear, and throw it.' So Pallas Athene spoke, and breathed into him enormous strength, and, making his prayer then to the daughter of Zeus, he quickly balanced his far-shadowing spear, and threw it, and struck Eupeithes on the brazen side of his helmet, nor could the helm hold off the spear, but the bronze smashed clean through. (24.516-524)
Laertes (he's the son of Arkeisios) smashes a spear right through the head of Eupeithes, Antinoös's father. It's fitting that Odysseus's dad kills Antinoös dad—and it would never have happened without Athene's help. Hm. It sounds like one side really has an unfair advantage.