"McDonalds is piss poor quality fast food."
It's really not. McDonald's fries are generally held as one of the better french fries available anywhere among food critics. Sure, the burgers are basic and lack expensive elements, but they are a consistent quality and flavor and handily beat what most people can cook these days (especially in a microwave).
I can cook a better breakfast sandwich in a frying pan, but there's simply no chance I could do it in a microwave. And I'm a really good breakfast sandwich cook - I would prefer McDonald's to most of my friends' cooking.
I can cook a better hamburger for sure, but I'll spend a lot more money doing so. And it won't be cooked in a microwave.
When I think of "piss poor quality" I think of improperly prepared food: under/over cooked, stale or spoiled ingredients, etc. McDonald's isn't fancy, but it's certainly consistent. I don't think you can call it bad by any means.