Erik ten Hag must still be scratching his head wondering how Manchester United left the London Stadium emptyhanded. The Red Devils dominated much of the game despite losing 2-1 to West Ham, especially in the first half when Manchester United created an abundance of chances. However, in what is quickly becoming a very frustrating trend, United were made to pay for their poor finishing. Alejandro Garnacho was “infuriating” to watch as he rattled the crossbar just a few minutes into the match, while Bruno Fernandes and Rasmus Hojlund also missed big chances. But the biggest blunder of the match –…