I wanted to like them - Lead Sales Associate/Key Holder Dollar General Employee Review

I hired on as a part-worker because I was reentering the workforce after a few years and because it was a local opportunity. I suspected before I started that I would be underemployed and would not be working to my full capabilities and that turned out to be the case. I really don't have anything negative to say about the manager that hired me. That manager seemed to be overwhelmed and was always at the store and I believe had been with the company for 2 or 3 years at the time; so I settled into just learning the basics and getting a general feel for how things worked. After about 3 months I decided that I wanted more responsibility and started to ask. This is a difficult thing to ask for because Dollar General's system of doing things is to only have 2 people working in a store at a time. So getting training on anything is like pulling teeth. After several failed conversations with the manager on how I might accept more responsibility; I decided to apply for positions with some other local stores as a means of creating a paper trail. Those efforts turned into a transfer to another store. It's important to note that I left my original store on good terms with my manager. I was only at my new store for a week before the manager that accepted my transfer departed the company. (I understand that manager was terminated.) I was at my new store for about 2 months before I decided to transfer back to my original store. (I could make a separate entry about that experience.) I did learn some additional things that corresponded with gaining additional responsibility. I don't think it should've required that I transfer; but I'm not in charge of how Dollar General chooses to do things. In February 2020 there was a massive turnover in personnel at the store I was at (I'm back at my original store). So massive, that I'm the only remaining employee. A new manager is brought in from elsewhere and the new district manager decides that the first order of business is to send this new manager to another store for 2 weeks for training. The new manager gives me their login information so that I can perform management functions in their absence. I am told that I'm doing a great job keeping things going and that I'm being considered for promotion to assistant manager. I got sick at the beginning of March (right before this COVID-19 pandemic), sought medical aid, and called in sick for a day that I previously agreed to cover a shift. I used that day to rest and then went to work the next day; still sick, but at least with prescribed medication to feel a little better. I allegedly failed to put some coin rolls into the safe and failed to set the alarm when I left the building that day I came in sick. While I wasn't shown video of this; I'm willing to concede it happened; but I feel that with my work history and recent performance; a write-up would've been sufficient; not termination. And that's my story. I was fired for making a mistake that I only made because I was ill. I had documentation proving that I saw a medical professional; and it meant nothing.