Management always looks out for their own. They will defend them til the end, and never admit harassment. I was shocked at s big company I worked for protected a rogue manager for years. Our Shepell complaint line ended up letting the manager know about legal action and details of our complaints. They made my life miserable, even though my performance reviews were perfect 12 years and I surpassed all targets. I had to request a package and leave. I just never imagined a big company could treat a person this way. 
With no union, you’re on your own. No other fellow workers will speak for you. Shepell never answered any complaints