Earlier quoted context omitted.
It's partly what happens when such important rules are determined by who is appointed at an executive agency, rather than requiring an act of Congress. The former can be trivially gamed by the party in power after each election, whereas getting Congress to take action on something can be difficult and requires you to first get them motivated to do so at a given moment.
I'd flip it and say its what happens when Congress has been dysfunctional for over a decade. It's not even possible to get a house bill with net neutrality passed without it included 99 other things that will inevitably get the bill punted on forever. Congress could have drafted this anytime if they had seen fit, but they are "too busy" fighting ideology wars.
Also consider that this works both ways: If something is passed into law by Congress, it's going to take monumental effort to undo it just like getting it passed was. An example of this is Obamacare, where getting it passed was difficult and revoking it has been difficult.
Likewise, the flippant nature of orders authorized by the Executive Branch is also by design. Such orders are meant primarily to address short-term concerns requiring immediate or expedient attention, not long-term concerns that require thorough deliberation.