Metallica's Unbeautiful Music

I was big into heavy metal as a teenager. I would say certain Metallica songs are beautiful. Can we actually say this or that piece of music is unbeautiful and that being objectively true statement? I think so. We can recognize it with the... Take music where it's completely atonal, but not intentionally. So technically it qualifies as music in a very, very base sense,. But it lacks what is essential to a properly beautiful thing. And so I think we can say that that's ugly without hesitation.