There were definitely many issues in training and to a TV announcer or a spectator, the mistakes were very obvious.
For example, in the case of Balotelli, what surprised him was that this kid did not mean to be sloppy. On the contrary, he was very hardworking and competent during training. Before this, Twain thought that Balotelli was going to go against him for sure, but his current performance really surprised him. Initially, he even wanted to pick on Balotelli, to pick on his weaknesses and mistakes and suppress the rest of the team, using him as an example.
It seemed that he did not know anything about his players and it really was a setback.