A controversial former manager and businessman who failed in an attempt to buy Man United has ripped into the club’s management. The Red Devils’ 3-2 win over Newcastle United last night was only their second victory in their last 10 matches in all competitions. They are on course to finish 8th in the Premier League and miss out on European football next season, which will be the first full campaign with Sir Jim Ratcliffe pulling the strings behind the scenes. The British billionaire became the biggest single United shareholder when he acquired 27 per cent stake in February after a protracted t…