According to the "Hosokawa ryoke ki" (Record of the Two Houses of Hosokawa), the problem was that Masamoto let his vassals conduct the governmental affairs and became carried away with shugendo (Japanese mountain asceticism-shamanism incorporating Shinto and Buddhist concepts).
それは政元が政務を家臣任せにして修験道に溺れているということである（細川両家記より）。