NMIXX - O.O
^ Obvious one, but I can't stand it. I've never cared for the purposefully too-experimental, trying-hard-to-be-avant-garde sound, but O.O takes all the cake. I'm glad it bombed.
Itzy - Loco
^ I'm honestly not sure if it's called Loco or Crazy in Love, but I'm too lazy to look it up. That said, Itzy's always had a... unique sound, and every so often, they get it right ("Wannabe" and "In the Morning," for example), but all their songs have these weird, not-quite-existent chorus lines and funky- clunky instrumentation, and Loco was the final straw for me. I hope they step things up with their comeback.
EVERY SONG BY BLACK PINK
^ Their music sucks. Don't even try to fight me on it. We all know deep down if "DDDD," "How You Like That," "Ice Cream," or "On The Ground" was released by a small or medium company, it would've bombed into oblivion. Don't get me wrong, the girls are pretty, have great personalities, and their stage presence has only improved with time. That's why I feel bad their discography is so minimal, and what IS in it is TRASH.