Trouble parsing lyrics under lack of particles

Question

As always, we have to take non-sentence poetry at face value; sometimes it is almost always ambiguous, but there is probably another perspective I am over looking. Taking a look at the final verse from きのこ帝国's second track from 渦になる, titled "退屈しのぎ" (full lyrics and transcription / translation I'm working on):

唐突に始まるお前の昔話
聞きながらアルペジオ
冴えないノンフィクションの結末を
握っているお前の手は冷たいから嫌だ
やさぐれ吐く息に混じる声が歌い出す

The bits of this verse fall out pretty easily, but the way they fit together is a little hard for me. My attempt:

唐突に始まるお前の昔話 == "Suddenly it begins, your reminiscence"

聞きながらアルペジオ == Is the 昔話 being listen to, as in "while listening"? (Could it be ながら "although [in which case, does this imply an arpeggio is being "played"?]) Is this 聞き as in "ask"? Why is アルペジオ surrounded by no verb phrase or particles? Is it アルペジオを as in アルペジオをする?

冴えないノンフィクションの結末を == "concludes the dark / sullen non-fiction"

Could this 冴えない mean "boring / uninteresting" ? Does アルペジオがノンフィクションの結末する mean the same, as in, the arpeggio concludes the non-fiction?

握っているお前の手は冷たいから嫌だ == Does this 握っている describe お前, resulting in something like, "Your hand, that I'm clutching, is cold, so I hate (holding) it"

やさぐれ吐く息に混じる声が歌い出す == "Sings in a voice with a sulking breath"

Answer 1

As far as parsing goes, my brain is intuitively seeing three "sentences" in this verse.

• 唐突に始まるお前の昔話(を)聞きながら、アルペジオ。
• 【｛（冴えないノンフィクションの結末）を握っている→｝お前の手】は、冷たいから嫌だ。
• ｛（やさぐれ吐く息）に混じる声｝が、歌い出す。

Note:

• Some verb after アルペジオ is omitted. What's omitted is a very hard question for me. One easy option is to extract the アルペジオ part as a sentence word (like "Parsley sage rosemary and thyme.").
• 冴えないノンフィクションの結末 = the ending of a boring/uninteresting/mediocre non-fiction story
• ～を握っている = to have control/discretion over ～
• 握っているお前: 握っている modifies お前 (this is perfectly fine in Japanese), and お前 is the person who is doing the action of 握る.