Having no money in the bank account and being left by a wife are both very unfavorable things and so someone considering this to be the best feeling ever is sarcastic.
Consider the statement "I was totaly destroyed when I found that my wife took all the money that was in the bank account and left me.". Based on this "The news that my wife emptied our bank account and left me is the best feeling ever" a true statement? Yes, no, or I don't know?