You may be looking for Sturgeon's law: "ninety percent of everything is crap." > The phrase was derived from Sturgeon's observation that while science fiction

You may be looking for Sturgeon's law: "ninety percent of everything is crap." > The phrase was derived from Sturgeon's observation that while science fiction was often derided for its low quality by critics, it could be noted that the majority of examples of works in other fields could equally be seen to be of low quality and that science fiction was thus no different in that regard from other art forms. https://en.wikipedia.org/wiki/Sturgeon%27s_law https://en.wikipedia.org/wiki/Sturgeon%27s_law