Why do pilots have such a hard time recovering from a rapid decompression upset?

Question

assume that this is a commercial airliner and the pilots are highly trained and get to their oxygen quickly without passing-out.

Answer 1

Or for that matter, what makes you think that rapid decompression would cause the aircraft to "upset"?

Don't believe everything you see on TV or in the movies.

The chance of this happening to a modern airliner is so remote as to be almost impossible, but the pilot's prime concern if it did happen in a passenger aircraft is to get the airplane to an altitude where the outside air is breathable. This is normally considered to be below 10,000 feet. While a rapid descent from 30,000+ feet to less than 10,000 feet could be traumatic for the passengers, it can be done safely and in a controlled manner.

Answer 2

I'm not sure what you mean by "having a hard time" and "upset" - what makes you think pilots have a hard time dealing with it, and why would it "upset" the airplane? What are you basing your comment on? If a rapid decompression occurs, the priority is to descend to an altitude where the air is breathable as quickly as possible, going by legal requirements for oxygen this would be about 10 to 12,000 feet. The aircraft is still under full control and not "upset" in any way!