Of course Noah's flood is fictional mythology, there is no archeological record derived from physical evidence or by any human recorded evidence when this event supposedly occurred ie ... Egyptian or other ancient civilizations.
Unusual weather occurrences (floods) were deemed by the ancients as acts of the god(s)
The other stopping point into critiquing this event is that bible believers assume the bible as being truly god's holy word and therefore they should not take the writings within the bible as not being true.
Fear and ignorance compels people to think in a biased closed minded fashion.