He has a point though. LA Galaxy managed to get through in the first half. Imagine what a world class opponent will do. Also note, The Netherlands played 5-3-2. United played 3-5-2 today. It's basically the same but the aim of the latter is to put early pressure. United did that excellent in the first half.
Though, it's all new for some players aswell so in time if they decide to stick with 3-5-2 it'll become a lot better. Herrera was amazing, clearly the best man on the pitch by far. I thought Fletcher wasn't mobile enough, seemed like he was unable to keep up with the high pace game United were going for. Shaw looked a bit nervous and out of place. He'll grow into it eventually, it's mostly new to him.