I am Italian, so I get subjected to it constantly. It's currently the most popular genre here.
The "melodies" are blaring, poorly autotuned lyrics (and EXTREMELY autotuned, literally one of the defining genre characteristics) speaking a cringy half-Italian, half-English gangsta type of stuff, pretty much anthems to consumerism, bigotry and general stupidity. Which would be OK if it had any artistic value (I do like rap music), but effort put into the lyrics (and the song in general) is just about 0, you'll hear words rhyming with themselves and even grammatical errors in the songs.
The "base" is so generic you'll probably hear it several times throughout popular songs, and is extremely repetitive and basic (sometimes 1-2 tunes repeated in loop).
I literally listen to everything else. Country music? Check. Nickelback? I've listened to some, didn't mind it. Weird avant-garde stuff? Got some in my playlists. Heck, noise music? I can appreciate some. But Italian trap music specifically just has something that makes me annoyed to the core of my being. It feels like listening to a foreign version of 6ix9ine or Lil Pump, except it somehow manages to sound worse.
(I may have created a copypasta. Feel free to share it lol)
Italian trap "music"