Big and small, beautiful and ugly, essential to damn near useless, the world is full of random manmade things that have been brought into this world to serve some kind of purpose, even if it's not a very good one. Without the assortment of objects that we have created, human beings wouldn't be the supposedly advanced species we are today.
At the same time, there are quite a lot of things out there in the world that just aren't fit for purpose. All of us have come across examples of crappy design in our lives, and have had to deal with the consequences of using it. This is why it's something that makes a lot of us angry, and why many of us share our frustrations with the internet. There are way too many designers out there that are bad at their jobs, and it's about time that they got shamed for it.