toughness

noun [抽象名词]韧性；硬，切不动；坚韧，坚强；艰巨性；强硬；强暴

According to the public, at least, it's not that they lack toughness, management talent or proper skill sets.
至少在公众看来，这并不是因为他们缺乏韧性、管理才能或是与之匹配的技能。