The Misonines and the Sea Peoples

This theory has been put forward due to the problem that there is yet to be any sign of a cultural change right after the destructions. I is thought that the sea peoples were marauding bands that wouldn't leave any trace of their culture as they raided settlements and wouldn't stay long enough to leave any traces of themselves. Though archaological evidence has shown that throughout the mediterranean world, a series of conflicts from raiding forces can be seen but not a single united group operating in a single wave. So if it seems unlikely that the misonens were in a state of collapse from outside invaders, what else could explain the widespread destruction? Perhaps, if not an outside enemy, maybe