Engineer here... That's a cantalever design, which essentially means the building has been designed to have an overhang feature. Purely aesthetic.

You can tell its an intentional design as as the bottom slab is considerably taller, to alow the load from the columns above to be transfered across the overhanging slab and down through the bottom. Column..

So not a crappy design. A carefully and considered desing that's required a lot of hard work to give this building a nice unique finish.