Unzumutbarkeiten is a long and somewhat formal German noun that translates to "unreasonableness" or "unacceptable things." It's not a word you hear every day, making it quite striking.
In the song, Kraftklub uses it to describe a list of things they find utterly intolerable, from new episodes of Scrubs to Mario Barth. It perfectly captures the band's signature cynical and critical tone, highlighting their frustration with various aspects of modern culture.
Ever feel like the world is full of annoying things? That's the starting point for Kraftklub's "Songs Für Liam." The singer lists everything that bothers him, from bad music on the radio (specifically, the Black Eyed Peas) to the fact that you can't smoke in bars anymore. He feels the world is generally "going to the dogs," and nobody is doing anything about it.
But then, he reveals his surprisingly simple and powerful solution: a kiss from a special someone. In a funny and exaggerated way, he claims this one kiss can fix everything. It could reunite the famous feuding brothers from the band Oasis (Noel and Liam Gallagher), bring friends back home, and just make the world a "little less crappy." It's a humorous and romantic song about how love and personal connection can feel like the most powerful force against all the problems in the world, big or small.