Poor team leader skills - Lead Associate DENSO Employee Review

Some of Denso team leaders at the Battle Creek plant show poor leadership skills ,favoritism and mostly don't care about the quality of the parts . My personal experience at Denso is a living hell day in day out no matter how many times you go to upper management nothing is done to take care of problem for long term. As a female at Denso I'm over looked and treated less, my qualifications are higher then anyone on my team and still nothing .