Hi, I'd like to help you with your question.
Counseling is when a trained professional, usually a person with a Master's degree or Ph.D, uses education and experience to help someone overcome a mental health problem. Just as a doctor goes to school to learn body systems and diseases, a mental health professional goes to school to learn about behavior and diagnosis of human behavior problems. Therapists learn how to address these problems through therapy and medications.
Just as other professionals vary in skill and knowledge, therapists do as well. You may have a good therapist who is skilled in the area of your needs and can help you overcome your issues. Or you may have a therapist who is in the field for the wrong reasons and does not have the skill or experience to help.
Not everything a therapist says is right. Therapists are human and do make mistakes. There is an ethical code by which all therapists must use to minimize damaging mistakes, but for the most part, therapists do the best they can to help.
No one can turn anyone against you that doesn't want to be manipulated. Therapists may understand manipulative behavior more than others, but only a person who is interested in hurting others would use such knowledge. Therapists are bound by an ethical code to not hurt others so using their knowledge to hurt someone else by manipulation can cause a therapist to lose their license. Just as a doctor knows how to physically harm someone, they would not use that knowledge unless they had something wrong with them and go against their own ethical boundaries. It is the same for a therapist.
I hope this helps you,