... but hearing those tuneless, offensive lyrics repeatedly makes my blood boil. (Para. 3)
Meaning: ... but hearing those tuneless, offensive songs over and over makes me angry.
lyrics: n. words of a song, especially a modern popular song 歌词，尤指流行歌曲的词
tuneless: without tune; not musical; not tuneful
The song is tuneful, but her voice is tuneless. 那首歌很动听，可她的嗓音却很难听。
make one's blood boil: make one angry
Seeing the driver beating his horse made the kind old man's blood boil. 善良的老人看见车夫鞭打那匹马，心里很生气。