When files take five minutes to download or your cloud software hangs while a customer is on the phone, the default reaction is usually to call your internet provider and complain. Most of the time, the internet provider is not the problem. The $60 consumer router sitting under someone's desk is.
Off-the-shelf routers and unmanaged switches from a big-box store are engineered for light home setups, like streaming a movie or checking email on a tablet. They are simply not built to process heavy commercial workloads, handle high connection volumes, or manage constant data transfers.