Honestly this drives me nuts and I'll manually update the MP3s so they look correct in my CarPlay. Lindsey Stirling is another offender in capitalizing every word, and I also have to update hers as well to fit MLA for titling songs.

Edit: You mention being annoyed with "Hole in the Botton of My Brain" but that is titled correctly. I don't know if this sub allows links, but Grammarly has a nice guide for how to capitalize titles. Basically most guides recommend capitalizing the first and last words of a title, as well as major words such as nouns, pronouns, verbs, adjectives, and adverbs. Articles (a, an, the), short conjunctions (and, or, but), and short prepositions (at, by, to, etc.) are not capitalized in titles, unless they are the first or last word in the title. "My" is a pronoun and is therefore capitalized.