Disturbed can be utilized to describe someone that has problems with mental health because of very not happy or disagreeable ordeals:

crazier; craziest Britannica Dictionary definition of CRAZY [also extra crazy; most crazy] one  : not sane: like a  generally offensive : having or demonstrating significant mental health issues a medical center for crazy

You need to use it to necessarily mean not sensible a 다이어트 crazy concept . You can even utilize it to signify pretty offended, very enthusiastic or extremely fired up: She'll go crazy if she finds out. The group went crazy.