Kyran thought he had learned his lessons. He could judge the situation properly and save his clan by staying calm and not letting his emotions get the best of him. He had judged that staying low and completing his preparations was the top priority. By doing so, he could minimize the casualty on his end after making a move. However, this very mindset made him misjudge his enemies' intentions.
Why did he not try to find the real reason Haylee had not made any move during the first couple of days of the joint military exercise? Why had he accepted it without verifying when he had thought of a possible reason? Why did he waste time building the Conclave's reputation by acting as 'Tyr'?
Because of Kyran's 'complacency,' he neglected a very important point.
While he is busy taking his sweet time preparing, his enemies are also making a move. They will not wait for him.
"Don't think this is your fault."