Town’s desperate season suffered another jolt on Saturday when the basement club endured a 22nd defeat in 30 top-flight matches with a 2-0 home reverse to Bournemouth.
Siewert said. “The first half was not acceptable for me and that is why I talked to them at half-time.
“They showed a reaction and the second goal came at a very unlucky moment. I feel sorry for each supporter who came and saw the first half. It was not my football at all and not the attitude I wanted from us, especially in the last third.
“We were no threat in the first half and there were some things which I really did not like.”
Siewert also stressed that the task he has taken on at Town is not a tougher one than he envisaged. The former Borussia Dortmund second-team coach is under no illusions about the size of the job he elected to take on in January. He added: “No, I knew that this job was very difficult. I am 36 years old and I knew this would be difficult.
“But I am brave and I am a fighter and I will still fight with the right attitude.”