I am a former Dollar General employee and have met some very rude coworkers as well as very helpful and nice ones. The main problem is that people are handling their complaints and compliments incorrectly for them to have an effect.
Dollar General is a very large corporation and they have trouble tracking down the offenders on their own. As well the people who do their job well and are helpful are scolded for spending too much time with individual customers because the work load is horrific. If you truly have concerns and want your voice to have an impact please direct all compliments and complaints to the dollar general customer help line 1-877-463-1553. I still have friends that work for the company that do an incredible job for their customers.
Let the company know both. Get names, times, and Store number.
Attention will be paid. Thank You.