If I remember correctly, currently it is thought that the collapse was caused by many negative events happening almost at the same time. One of those are so-called Sea Peoples (seriously [0]). A single impact could explain a collapse of a city or a country, but not the fall of the whole region.
Extra Credits once did a series of videos describing various weak points that could lead to the Late Bronze Age collapse: https://www.youtube.com/watch?v=KkMP328eU5Q