When a soul or pop song has a cut-in from another genre - I don't want to be listening to a sad song about the depressing life of an impoverished mother and then have R-N-T REAL NIGGA TYRONE cut in to talk about big butts & club whores.
Composers who use synth without exploring the diversity of genre that's afforded to you when you don't need to buy new instruments for every style of music, so all their shit sounds the same because they're just remixing the same ten sounds into entire albums since the synth doesn't have any variability unless you make the sound variable yourself.
Overmixing the strings so I can't make out the lyrics and moving my bass knob doesn't help because it doesn't affect the strings or the lyrics.
Songs where the opening is so loud I need to turn my speakers down before it even starts so it doesn't hurt my ears.
Songs that are more sample than original work but don't credit the sources for their samples, even when all the samples are from one or two other songs.