If you're in the restaurant business, you may well have heard of Toast (TOST -4.73%). The company provides a range of software-as-a-service products and financial solutions for restaurants. The goal: allowing owners and operators to better manage their locations via a digital toolkit that allows for smooth functioning and minimal disruption. In other words, Toast aims to be a restaurant's all-in-one operating system. However, the growth tech stock hasn't really taken very good care of its shareholders. It's ...