In my line of work, I do a lot of listening to managers bickering about losing good employees. It's understandable--turnover is costly and disruptive.
So, many of them will point fingers somewhere, but the data I receive from exit interview reports, feedback instruments, and employee engagement surveys has fingers pointing back at them.
This is consistent with leading research by Gallup. In one study of 7,272 U.S. adults, it found that 50 percent of employees left their job "to get away from their manager to improve their overall life at some point in their career."
We've all heard this "tune" play like a broken record: People leave managers, not companies.