West Ham manager David Moyes was Sir Alex Ferguson's handpicked successor after the Scottish manager stepped down as Manchester United boss after 27 years in 2013 but he would not last and was fired just eight months into the job.
Moyes had spent 11 years at Everton before he was hired by Manchester United; things went really bad for him after the United job. He had three one season jobs at Sunderland, Real Sociedad and at West Ham. He left West Ham in 2018 and returned in 2019.
He has now transformed the club and got them playing in the Europa League where they are one of the favourites to win the competition. Their win over Liverpool today moved them up to third on the Premier League table tied on points with Manchester City and six points above Manchester United.
Manchester United have had Ole Gunnar Solskjær as manager since 2018 and have kept faith in him during times where results were not favourable, and are yet to win a silverware under Solskjaer. Moyes' improvement of West Ham proved Manchester United should have given him time.