Can the supervisor ask a student to add them in an acknowledgment without any useful feedback I am a PhD student. At the beginning of my study, my supervisor told me that they are able to help me with my topic. However, later I found that they cannot even understand what is my topic. They wasting my time for more about one and a half year without any comments or help with my topic. Then, I worked entirely alone with my topic. I have done the first chapter of my study, they asked me to be co-authors with me for nothing but just because they are my supervisors. I refused this. Then, they asked me to add them in the acknowledgment as they are the supervisors of this project. They asked me to write this in every single paper of my Ph.D. papers. They did not help me with anything, they even cannot understand the difference between my objectives. My question, Must I acknowledge them in my papers?
Giving a mere acknowledgement to supervisors is a pretty low bar, and it would be a pretty extreme reaction to deny this.  Even if they did not succeed in assisting you with this paper, presumably they must have made some attempt to assist you in their supervisory role, and they have taken time out of their own schedule to try to assist you as a student.  That in itself warrants an acknowledgement and thanks, even if you are of the view that they did not contribute anything of value.  It is usual to add someone as a co-author only when they have made a substantial contribution to a paper, but the bar for an acknowledgement is much lower.

I note from your further comments that you are of the view that your academic supervisors do not understand your topic, and the Dean of the Faculty is "with their side".  I also note your comment that they have asked you to withdraw from the university, or at least take a long vacation.  Under such circumstances, you should try to engage in some self-reflection and see if you are acting reasonably, or if you might be contributing to the problem.  Refusing any acknowledgement of assistance (or at least attempted assistance) by a supervisor suggests that you are not acting in a manner conducive to good relations with your supervisory panel.

It is not entirely impossible that a supervisor could be incompetent to assist a student, or that a Dean could incorrectly side with the supervisor in this case.  However, it would be very unusual if multiple professional scholars do not understand the topic of a student they are supervising, and are not able to provide a student with any assistance.  Application of Occam's Razor would lead an outside observer to conclude that the more likely explanation is that it is the student might not properly appreciate the efforts made by their supervisors.  The refusal even to acknowledge and thank them in a paper contributes to this perception.