Manchester United manager Erik ten Hag must shoulder his share of the blame for the team blowing a three goal lead. Football is wildly unpredictable and anything can happen. Just ask Manchester United and Coventry City fansafter a crazy semi-final. For Manchester United, however, attributing the game to just ‘football, bloody hell’, as Sir Alex Ferguson would say, doesn’t really cut it. There will be an inquest into why United blew a 3-0 lead, with the game going to penalties. In fact, United were incredibly lucky not to lose 4-3. READ MORE: Who are INEOS? Exploring Man Utd co-owner Sir Jim Ra…