How could I be destroyed? What did I do to deserve this?  ירושלים went through many stages to understanding her questions. When ירושלים starts speaking she feels sorry for herself. She is speaking like she is the only thing in the world that is in pain. She makes herself the victim in the situation. She feels like her friends have betrayed her, and now she is extremely lonely. She shows the anger that G0d has thrown at her. 

But soon she turns drastically in how she assesses the situation. She realizes that it was because of her own sins that G0d acted in this way against her. She begins to take responsibility. But she does not end here. She still thinks that her enemies that were sent by G0d should be punished also because they rejoiced when they destroyed ירושלים. 

Maybe when ירושלים was speaking about all the anger and destruction that was coming from G0d, it was happening at that moment. When something is happening at the moment, you don't have a lot of time to think about the situation and assess it. Later, when she had more time to think, she realized that G0d's anger was because of her sin she did. She feels more sorry and takes responsibility. 

Many bad things can happen in our lives, some greater than others. When you are in the moment of a bad time, we need to remember that what is happening to you, may not be G0d's fault, and you shouldn't see yourself as the victim. We need to remember that sometimes we are punished for the sins that we do and not just because G0d want to see you hurt.