I honestly hope you are lying about your profession, rather than venting your personal frustrations with clients by arguing with people that you believe resemble them online.
I have absolutely no frustration with my clients. Be it psychopaths, social anxiety, pedophilia, or schizophrenia. I think I currently actually like all of my clients. And I think all of them I appreciate my approach. Because with them, I don’t care about labels. I only care about figuring out together what the real problem is. Can I accept who they are no matter what their problem is, or who they are. The only thing I “fight”, metaphorically, against self deception.
That doesn’t mean that diagnosis is are handy quick references for the topic at hand.
Obviously, I don’t talk so directly confrontation with my clients as I do on a forum, but I follow the same principle. If I disagree on their own self assessment, I talk with them about it until we both agree on what the real problem is. Sometimes I’m wrong. Sometimes the diagnosis label people give themselves is a defense mechanism.