5) David Moyes, Manchester United
Old Trafford never seemed the right fit for the former Everton boss. After 11 years of relative success with the Toffees showing some similar attributes to the great Sir Alex Ferguson, it made sense on paper. However, it was hardly inspiring for fans after being linked with Pep Guardiola and Jose Mourinho, which seemed to hamper the Scot’s chances from the beginning. It was over before the end of his debut season, sacked in April 2014 with the side languishing in seventh.