More likely that many (most?) employees don’t care about directly harming the company they work for if they can score points for themselves or their departments in the corporate version of game of thrones.

Similar to how in a two party system, politicians will often prefer to lose elections to the other party, rather than lose control inside their own party.

It only looks self-destructive from the outside.. inside a sufficiently large bureaucracy me/us/them all get muddled