So which is it? Poor quality -> no support
No support -> poor quality?
It can be a self-feeding problem. If you get no support, you cut staff, and your staff might be good cooks. A pitmaster, the prep cooks, etc.
Now you got the leftovers doing what they can and you buy bargain foods to see if you can turn it around. The "initial excitement" money is gone and now its "trying to keep this thing going" money where you are shaving costs. It also could have been lazy, poor BBQ from the jump that cost them. Most businesses fail in short order so who knows, but word-of-mouth is everything for small joints.