As was touched upon by my post- mutiny for them would have been an exceptionally different approach than how they historically responded to the will of their god-king. Their philosophies overwhelm such independent-minded approaches.
No, they agreed to do their ruler’s bidding, even at the cost of their lives. I’m sure there were some who resisted, there always are- but they would have been met with little sympathy from their brothers-in-arms.
As for the effectiveness of their tactics- I do not disagree. Very wasteful. But again, completely genuine to their culture.
The goal was to succeed by any means. Guadalcanal was unusual in that the Japanese we fought had not known defeat and were certain that we soft Americans would buckle. The units we fought were Royal Marines, big strong, well trained. They were tough to kill. Their fatal and worst mistake was being unaware of the fighting spirit and toughness of our Marines and our superior fire-power.