Last one I bought was a Columbia Sports Wear leather belt last summer/fall and it's already falling apart
If you bought a lightweight leather belt, chances are it was made with "bonded leather". Think presswood with leather instead of wood. As you've found out, they don't hold up well when carrying a weapon. Almost all of the makers listed above in this thread use full grain cowhide or other equivalent leather. Full grain leather tends to hold up well for a long period of time.
I've got several belts I've made, one of which is over 10 years old. Other than taking a waist contour, it wears as well and looks almost as good as it did the day I made it.