atla-annotated:

The Last Raid - What the Raids did to the Southern Water Tribe

When you compare Hama’s memory of their village, to Sokka’s memory of the day his mother died, while there is a noticeable difference in village size and construction, that difference is nothing in comparison to what we see in season one. 

It is very obvious that the reason the raids stopped is that the FN won. Had Aang not defeated Ozai and the Northern Water Tribe not sent people, that settlement, and the Southern Water Tribe, would have been gone within a lifetime.