Can the supervisor ask a student to add them in an acknowledgment without any useful feedback
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.