The basis for repentance is ownership of the misdeed. Each of these are problems with medos. Hashem gave us a very strong sense of right and wrong. A person living in denial may very well know the truth. In fact denial is denial because it is the act of denying what we know or believe to be true.
Pride stands in the way.
It's very difficult to get around. In other words one teaches others to apologize properly but neglects to follow their own teaching. Frequently we knowingly tend to be overly lenient with our self. This results in a skewed judgment. If we can get by all of these, we may actually be able to acknowledge or own up to the fact that we have done wrong.