Master Dameng shifted the blame onto Ji Buseng, which was really quite baffling.
But at this moment, he needed a target to vent his frustration—he couldn't possibly admit that it was his own miscalculation, could he?
So, Master Busheng made for a perfect scapegoat. Both are Wutai cultivators, bound by the Wutai oath. If you discovered potential danger and didn't inform your allies, but instead ran off on your own, what kind of person does that make you?
Perhaps that guy is hiding somewhere watching and laughing right now.
As for Master Dameng's previous unauthorized use of the Heavenly Thunder Plate, disregarding Ji Buseng's safety, and later clinging to Ji Buseng's flying boat to seize territory—these were all trivial matters in his eyes.
Having found a target to vent his anger on, the Da Meng Executor felt more at ease and released a weakly-defended flying boat for the remaining disciples to rest.
