Minato didn 't really mind getting stuck in the past. After his relationship with Kushina had ended in a mutual decision that they simply weren 't meant to be together he had struggled with rediscovering the contentment inside himself that had always kept him so loyal to his village. Getting thrown back several generations before his own time in a hiraishin mishap might have sounded like a tragedy at first but once he got used to the situation he realized this was just the sort of self-imposed challenge he needed. What better way to cement his allegiance to Konohagakure than to help build it?