Having scanned just some of page one, it seems folk are just picking fun novelty tracks to dislike. But be fair, variety adds interest, so most sre fine. A bad song is more about disjointedness, or a hook that's awful so you can't get it out of your head, or has lyrics that grate due to smaltziness or plain weirdiness.
One that riles me of late is about some weird guy who wants to go around dancing with his own father, that ticks both those last two in spades, and causes me to change radio channel if played.