The French Revolution occurred as a popular revolt against the centuries-long mismanagement and bungling by the Ancien Régime monarchy. This event began via a number of valid criticisms of the existing order.
However, it ended in a terrible mess, called the Reign of Terror. One of the goals of the revolution was to establish an equitable popular republic. However, this attempt resulted in chaos. To overcome this chaos, Napoleon became the new monarch. Finally, the revolution had come a full circle.
In history, a few people have tended to come up with good and valid criticisms of ideas and systems. However, it is one thing to come up with valid critiques based on popular sentiment and a whole another thing to come up with solutions. Many times, the solutions turn out to be worse than the original problems.