If you find MAD efficient, that obviously shows that you haven't seen many airports.
It is, in my opinion, the worst airport to fly to. Not only that ATC is incompetent but they will also show you that they don't give a s**t and that controlling efficiently the traffic comes far after the will to create chaos.
Combine incompetence and adverse attitude and no doubt that a major bug is coming.
At an operational point of view, MAD is definitely the worst place to be.