MANCHESTER, England : Manchester United boss Ruben Amorim took responsibility for his team's undoing in a depressing 3-0 loss to Bournemouth on Sunday that saw thousands of frustrated fans head to the exits well before the final whistle. Dean Huijsen, Justin Kluivert and Antoine Semenyo scored to keep United 13th in the table, the first time they have been in the bottom half at Christmas in Premier League history. "It is my responsibility to coach them," Amorim said. "Of course we want to