Its as simple as the last line: Art is over.

Their style of sharp, harsh sounds scrambling in your ears was meant to be a caricature of modern music, especially synth-pop.

Pointing out to all the sheep of the world that art is dead because they all have shit taste.

Maybe it's an idea that actually started with dadaism. I do recall reading a book about dadaism where there was a work of art which said "art is dead" on it, which is a phrase I often see used about places. I think the sentiment behind the statement (and don't quote me on this) is that art as a practice is dead, the ideas behind art are dead. Dadaism was a rejection of rationalism, which they felt lead to world war 1. It was basically the first punk movement, it was a rejection of commonly held principles. Whether or not gerogerigegege's statement is really even a statement, as much as it is just a vague artistic expression, it's hard say whether or not he was referring to the sentiments behind dadaism.