i used to say country before i found country music that was actually good (contemporary pop country is definitely still top 3 worst genres) but to me one of the worst genres has GOTTA be whatever jason mraz or colbie caillat is. like person singing with guitar shit that sounds like it belongs in a Hallmark movie. or honestly top worst has to be the flavorless nothingness of royalty free stock music you hear in commercials and youtube childrens content (you know the kind), which is like the hideous sibling of the previous genre to me, i think most wouldnt even count it as a music genre its so bad