It wasn't a 'trade collapse' or 'collapse' in one nation that caused the Bronze Age Collapse though.
I get you have a thing about comparing modern times to Rome or similar ancient societies, and comparing current events to them, to try to predict what will happen next.
However, you might want to look at some of environmental context to your historical allusions, before prognosticating about what is going on in the world. The Bronze Age collapse happened because environmental conditions outpaced many societies of that day's ability to handle adverse weather events, longer winters/colder summers, and the bad harvests that followed.
what your discribing was a factor yes but but above is a map of bronze age civilization.
what your discrbing kills nations, but a civilization is more then a country its more then a kingdom, its far bigger then that. I don't think you quite grasp how sophisicated bronze age civilizations were, or how expansive those trade networks were. Or what an absolutely devistating the collapse was.
If it were just environmental factors then there should have been a lot more surviving elements from the collapse because as you can see the map shows mulitple climate zones and countries, and yet egypt is pretty much the most notable civilization that survived the collapse.
Its not just sea people raids, its not just corrupt leadership, its not just environmental changes because while those can kill kingdoms easily there were a lot of kingdoms and a lot of empires running around during this time. I think it was multiple things hitting a systems weakpoints that caused a full collapse and its notable that more autarkic part of the civilization was the one that survived.
This isnt me bashing global trade but there are always trade offs. the current global trade system is incredibly efficient and has lifted a lot of countries and people out of poverty but its also the case that its vulnerable to outside shocks, and that a big enough one can bring the system down.
That said I don't think the coming collapse will destroy civilization this time its going in my mind to be an ugly crisis were millions die but I dont' think its going to end the world or anything.