Poor organizational structures and arbitrary/unrealistic deadlines mean that success is always unlikely. Management (not all, but too many) then often use bullying to force the pace - e.g. expecting significant overtime at no extra pay, public humiliation if deadlines are not met, shouting at people in public - and other tactics that are effectively bullying. If you complain, then you are not a team player.
Your colleagues therefore often end up working against you in order to help themselves - so competition of the unhealthy kind.