United are already in crisis mode after finding themselves four down at half-time due to a mixture of defensive ineptitude and Brentford opportunism. Goalkeeper David De Gea gifted Josh Dasilva and Mathias Jensen the first two, Ben Mee helped himself to a third and Bryan Mbeumo hit a slick fourth on a dangerous afternoon for the visitors. Manchester United’s David De Gea endured a night to forget (John Walton/PA) (PA wire) The defeat means Ten Haag is the first manager to lose each of his first two games in charge of Manchester United since John Chapman in 1921. It also left United bottom at the top for the first time in three decades and Ten Hag questioning his players’ hunger. “One, Brentford were hungrier and two, we conceded goals through individual mistakes,” said Ten Haag. “You can have a good plan, but then you put the plan in the bin. “I think it has nothing to do with tactics. The first two goals are about ball handling and decisions. “I think they follow my instructions, but they make bad decisions. This is football, it is a game of mistakes and we were punished. “When the results are like that, I can imagine (how the fans feel). It is not good to show it clearly and we need to change it. We need more hunger on the pitch as a team and as individuals.” You can have a good plan, but then you put the plan in the bin. Eric ten Haag De Gea let Da Silva’s long-range shot slip through his fingers for the first goal and five minutes later, in an attempt to play out of defense as Ten Haag demands, he allowed Jensen to nip in the second. “He didn’t have to leave the ball there because we gave options and the players have to choose,” ten Haag insisted. “We said ‘call them and play a lot.’ “I’m sure he can do it – and in the second goal, okay. He already showed in training and in the first games that he can do it. “I don’t want to play from behind when it’s not possible. It was naive how we played today. You have to play more direct. It is clear that at this level it is not the standard we want to operate.” Cristiano Ronaldo started and finished the match, but Ten Haag were left with three players at half-time, Luke Shaw, Fred and summer signing Lisandro Martinez. “I put in three, but I could change them all,” he said. “We wanted to bring some fresh energy to the game, not specifically to those who got into bed because I don’t think it’s honest to them.” Mee stepped in for the third when United failed to deal with a corner before Ivan Toney finished the game’s goal for partner Mbeumo. Thomas Frank was extremely proud of his players at Brentford (John Walton/PA) (PA wire) “It was a very good performance overall, I don’t think teams win 4-0 often in the Premier League and certainly not against Manchester United,” said Bees boss Thomas Frank. “This group of players continues to show me how good they are together. I don’t think it was a ‘4-0’ win, but it was a clear, deserved win. “We deserve a huge amount of credit. It was definitely one of our top performances here.”