The lack of any contemporary records.
Minoan and Mycenaen
the myceaneans were about along time before any of those other cultures
The Dorians conquered the Mycenaens because they had iron weapons and their swords were stronger. When the Dorians conquered the Myceaneans the Dark ages began.
The Mycenaeans were an ancient civilization that flourished in Greece during the late Bronze Age, roughly from 1600 to 1100 BCE. They are known for their impressive palatial complexes, such as those at Mycenae and Tiryns, which featured advanced architectural techniques and elaborate frescoes. The Mycenaeans played a significant role in trade and warfare, evidenced by their involvement in the Trojan War as depicted in Homer's epics. Their writing system, Linear B, is one of the earliest forms of Greek and provides insight into their administrative practices and culture.