See if he knows your field and your confusion. Basically, as long as you ask him professional questions, he always recommends the so-called team and teachers to you, instead of answering your questions specifically.
To solve your confusion, you need to be careful. If he is willing to exchange professional problems with you, and can put forward constructive suggestions, and mainly focus on your thesis, if he can put himself in others' shoes, he is not completely convinced, but at least there is a basis for cooperation, because even the best person, in different majors, the performance of the same major in different directions is uneven, limited by personal energy, time and professional understanding.