Criticism is not a purpose. It may serve a purpose, but exercised alone, the habit of criticism is the deadly enemy of destiny.
Sure, we can’t know what to fix if we don’t know what’s wrong. Analyzing processes, products, and even pieces of art for potential improvement is a valuable and essential skill. But if fault-finding becomes the aim, then the critic has lost his/her way.
For criticism, rightly used, is a catalyst to purpose.
A true purpose demands action: the well-designed doing that brings a destiny to life. When the purposeful criticize, they proceed quickly to forming a plan for improvement. From there, they make their next (hopefully wiser!) attempt at greatness.
Exercised alone, criticism is nothing but laziness. Paired with action, it can change the world.