Everyone knows that millennials are the worst. All you have to do is log on to any news site or turn on the evening report, and you’ll hear about all the industries they’re killing, the values they’ve destroyed, and the lazy way they love to live with their parents.

They even think they’re too good for all-American condiments, like mayonnaise. They’re always on their phones, which are killing their brains, don’t you know. And they have way too much student debt. All of this barely scratches the surface of why millennials are definitely the worst.

These days, “millennial” doesn’t have much of a connection to the actual definition of the word. Generations are a manmade construct, so experts disagree on the exact perimeters. However, the generally accepted range is the group of people born between 1981 and 1996. This means millennials aren’t exactly spring chickens anymore; the youngest ones are finishing up college, while the oldest are getting close to 40. They’re an established part of the voting system, the workforce, and more.

Whether people are referring to millennials by these actual guidelines or generally mean “those young ‘uns,” everyone knows that millennials are just horrible people. Here’s why.