there are bad apples in every bunch

Every group or organization has members ("bad apples") whose words or actions negatively impact an entire group of people. A: "Jeremy is such a brat. He won't listen to a word I say, and he gets the other kids all riled up too!" B: "Well, you know what they say—there are bad apples in every bunch." I get that there are bad apples in every bunch, but when the CEO is one of them, the company is doomed.