This company has a horrible culture problem that starts at their corporate office. They refuse to acknowledge poor leadership or employees that are a risk to their operations. Taking your concerns to HR, while they will treat you with compassion, is completely ineffective because quite frankly the company does not care about getting rid of problem people. Turnover in my department was astronomically high and no one bats an eye at that. Lots and lots of poor leaders in very high management positions that get to just stay in them.