McDonald's is perfectly fine food, depending on the problem you're solving for. If it's nutrition, you can do that. If it's affordability, you can probably do that. If it's availability, you can usually do that. If it's preferred flavor profiles, you may be able to do that. If it's moral issues, probably can't do that.

I worked in James Beard nominated restaurants and have eaten at 3 star restaurants, I have no qualms with fast food as food that couldn't be expanded to most of the industry.