mismanaged

/M IH0 S M AE1 N IH0 JH D/
verb
  1. 1

    To manage an area of responsibility in a way which is inept, incompetent, or dishonest.

    โ€œShe mismanaged my finances and left me bankrupt.โ€

  2. 2

    To behave, in a management capacity, in a manner which is inept, incompetent, or dishonest.

    โ€œThe fundamental reason why the company failed is that the CEO and other top managers simply mismanaged.โ€

Source: https://en.wiktionary.org/wiki/mismanage, https://en.wiktionary.org/wiki/mismanaged