Anti-gradualist explanation of history is an alternative and more likely explanation.
Gradualism means a version of history in which civilisation progresses gradually from less to more civilised over time. The opposite is a history in which there could have been moments when human civilization was more advanced way before our notion of recorded history, but suffered a massive hit to its existence. Then the civilisation after got rebuilt but with the previous culture and technological knowledge forgotten.
One such theory is by Graham Hancock and Randall Carlson [1]. They present an explanation of history in which there could have been a more technologically advanced human culture even during ice age which got wiped out when ice age ended.
The end of ice age was completely sudden, which they explain by a meteor crash into the huge ice sheets causing large tsunamis and sudden ocean level increase which wiped out majority of advanced population living in cities right by the sea - same as today. Causing the advanced culture and its knowledge to cease to exist with remains being picked up or reused by more primitive people living in mainlands and forming cultures which are now basis of our civilisation.
Their version explains currently unexplained phenomena such as
1. sudden extinction of ice age animal species. Hordes of mammoths found dead with broken femur bones (killed by massive tsunami vs killed by mammoth hunters as explained by current dogma)
2. Big Flood myths found consistently across many independent cultures around the world
3. Technological regress in Egyptian culture - pyramids and pottery way more advanced in older periods than in later periods (forgotten technology)
4. Way more advanced technology of construction in older structures in Latin America (Cusco, Machu Picchu, Sacsayhuamán, Pumapunku) with advanced construction techniques unexplained still until today
5. Geological evidence of massive tsunamis such as large travelling stones (sliding on melting ice sheets) deep into mainland North America or massive water erosion corridors also possibly explained by large tsunamis
[1] https://youtu.be/0H5LCLljJho