The issue is that Whataburger is a 24-hour store. So if you don't want to work in the bird shift you won't get many hours because everyone else wants to work normal hours. So you might be full time, but unless you are willing to work past the time you are scheduled or come in on days off, you won't be getting more than 25 hours a week.
Also, it's stressful. For the store to run the way that it needs it should have 12 or more people at all times, and you're lucky to get 7 including management. Overall it's fast food, and there are issues with the work that are common complaints, but working here is an issue just because they don't give you the time you need when you need it.
you can always pick up extra hours
little to no breaks, few hours, not enough people to do the job well usually