Now that he was looking at it from the perspective of a third party, he could see what went wrong and what actually caused him to fail.
However, saying that would only sound like an excuse without proof. That said, he had no intention of simply standing here and letting these pigs hiding in the safe comfort of the capital and enjoying their life in riches day in and day out, while the knights risk their lives on the frontlines fighting demons every day, run their mouths.
And most importantly, he was not the previous Reinhardt. There was no way he would accept punishment for a mistake the other guy made.
"While it may be true that my mistake led the Eastern Front to collapse. However, when the demons were invading the capital, what were your own personal guards and knight order doing? Why didn't they step up when they took away one of the Seven Divine Treasures?"