The things that destroy the team I have noted are:
They are always opinionated, push themselves, bypass their reporting people/hierarchy, look for other cabals to understand the "shortcuts", etc. I find these people are quite damaging, they can never trust their reporting people--even though the reporting person is quite rational.
These people will never trust their immediate subordinates. They'll constantly spy their subordinates as they're panic and will try to see if they have better subordinate below their immediate subordinates. By doing so, they always damage morale of their subordinates, their spirit for the team, etc. Often these people will have their enemy within their own / peer level than from sub-levels.
Though many times I have noted that these people are quite damaging, till now, I have no experience in "handling" them. Now, I have started understanding how to fix them.