Would the question,
What are the criteria of being a good parent?
What are the criteria of being a poor parent?
have answers that are mutually exclusive?
I think the answers might be different, but I have to say that I don't feel "What are the criteria of being a poor parent?" is a constructive question.
If they are seen as distinct questions, then the only purpose I could see for the "poor parent" question would be for ways to label or judge parents negatively. This isn't constructive, whereas the "good parent" version can be construed as a means of setting goals.