I know people who are the head of organizations and Ive asked them if they believe in constructive criticism. They told me not only do they accept it, they encourage it.
It seems the only place its not encouraged is chinuch. Everyone should listen to all VALID ideas (Some ideas are not meant to be contructive, only criticism) You have to know who is giving the criticism , why they are giving it and what is their motivation.
If they really want to help the yeshiva , it should be sought after and encouraged