With respect, you do not know what was going on at the plane at the moment, what the CSD was doing, or what was the most pressing issue. You do not know what instructions were given by the CSD to the crew. You don't know how the situation was managed, because you do not have all the information or all the variables.

Obviously the plane was operating well out of what would be considered the norm. For you to demand that the CSD essentially holds passengers hands as they descend the stairs strikes me as an odd requirement.

There was a fire on the plane which is non-trivial. You arrived safely. If I were you, my post would have had a very different tone. Probably giving the crew kudos rather than what we have here....