It does not lack the basic elements of "music" if you accept it's common meaning, nor does it "discard every core element" of it. And it does indeed happen to be "subjetively good" to some and "subjectively bad" to others. So that point didn't really make sense if you still want to agree it's objectively bad. Unless you don't accept that some people actually find it good.

Rap is rhytmical lyricism. Not the same as poetry, but comparable.

Taking into consideration this post and the first anonymous troll post that went in this direction, that you probably also wrote: It's impossible to draw the conclusion that something is "objectively bad" based on subjective statements like a component of it "being rubbish" or "sounding like utter shit". You're trolling, but you know, I like it when "low hanging fruit" helps making a very simple and objectively non-refutable point. (See what I did there?) Also, lyrical content is not really genre specific. Sometimes you can rap a lyric that wasn't written to be rapped, or sing a lyric that wasn't meant to be sung. Therefore, your point doesn't really work, as you're aware of. On a slightly more ad populum note: You really have to be stubborn if you see a crowd of ten thousdands of people dancing and jumping around and still not accept that they're doing it because of music. Comparing listening one of the best selling musical genres to playing with feces.. well. Doesn't make a lot of sense, in practice. You know, if you're into psychology and not being insane and all that. Also, it can't be "not music" and "bad music" at the same time. It can obviously not really be "objectively bad music" or "objectively bad poetry" in the first place. You're objectively bad at being a troll. Some rap lyrics are actually pretty darn clever. Black metal, now there's a genre that's objectively terrible all the way!