I want to echo what others have said. Chances are the root of the problems are partly systemic and partly reaction to change.
People respond to change in many different ways.
If the system does not have methods in place to facilitate the change process, it may take on a life of its own. Absolutly , management must commit to supporting you in a change effort. Unless, they are looking at themselves. Do the organizational assessment if you have a true commitment from management. If you don't change the system your continous improvement efforts will probably be short lived.