It isn't the number of executive orders that's the problem. Executive orders are a proper and even necessary tool for any President. The problem is, Executive orders were intended as a means by which the President executes the law as written by Congress. There are times when Congress fails to describe the methods or means by which a law is to be enforced -- for that, we have executive orders. They allow the President to create the framework by which he enforces the law.
This President's use of executive orders is entirely different. He has used them to defy the will of Congress, arbitrarily re-define statutory law, and most egregious...create law out of absolute thin air.