I would rather let everyone down than anyone. Refers to an extremely selfish attitude towards life.
From a psychological point of view, it is human nature for a bosom friend to make a big mistake, feel guilty and grieve. Simply put, when a person is sad, what he says must be full of pain. When he is sad because of regret, the emotional color in the sentence is even more ashamed. To sum up, let's not talk about what Cao Cao said later.