Why did bardock break up with fasha?

Bardock broke up with Fasha primarily due to the harsh realities of their lives as Saiyan warriors. Bardock's focus on his missions and the impending destruction of their planet created a rift between them, as he struggled with the emotional burden of their fate. Additionally, Fasha's desire for a more stable life clashed with Bardock's commitment to his role as a soldier, leading to their eventual separation. Ultimately, their differing priorities and the dangers of their lifestyle made it difficult for their relationship to endure.