I get questions about this fairly regularly. I do not recommend listing someone who negatively critiqued your work on any significant level, or has responded unfavorably to your work more than once. Understand that firms may contact that person anyway; it is not hard for a firm to figure out who you were probably working for if you were in a particular group or serviced a particular client. However, again, the last thing you want is to provide a reference who may say negative things about you. Therefore, even if it means that you do not list your main work provider, I would avoid listing someone who may say negative things about you. List other work providers, list work providers from past jobs who will glow when discussing you.
If you are on the fence about whether to list someone with whom you have had a questionable experience, simply….