7 Ways Managers Make Their Teams Miserable

'Tis the season to be jolly, but in many offices the Ebeneezer Scrooge approach to management is alive and well.  The worst managers lead to decreased performance, a slump in engagement and even increased employee turnover: far and away the most common reason individuals give for quitting their job is their line manager. The flip side of this is that the very best managers bring about a 25% uplift in performance.