If you're complaining about the quality of the burgers, you're missing the point. You don't go there for a gourmet experience, there is no point comparing it with a ?10+ burger from a restaurant/gastropub. It's quick, cheap, hot food that you can eat on the go, and tastes OK-ish. If you don't want to eat their food then that's fine, but showing off about it is just snobbery.