最深的孤独与绝望是你
[zuì shēn de gū dú yŭ jué wàng shì nĭ]
A poignant expression indicating that all the loneliness, sorrow, and pain they feel is linked to a specific person (you). In short, it shows extreme grief and disappointment due to being left by a beloved, emphasizing their innermost loneliness, sorrow, and despair.