Some-one's mismanagement of a system or organization is the bad way they have dealt with it or organized it.
例句
...the Government's economic mismanagement...政府对经济的管理不当His gross mismanagement left the company desperately in need of restructuring.他管理上的重大失误使公司陷入亟须重组的境地。
英英词典释义
Noun
1. management that is careless or inefficient;
"he accomplished little due to the mismanagement of his energies"