The speaker feels crushed by guilt and regret, and pictures themselves as already dead. The guilt is something they can't "wash off," and they blame themselves for shutting out social life and for lacking the nerve to do what they always wanted. The image of being tied up in vines suggests they feel trapped, though they also seem to think they tied the knots themselves.
The poem's central image is the speaker as a rotting corpse who dug their own grave, holding a phone and writing rhymes. That detail is striking: even in this bleak self-portrait, a small creative act continues, and the speaker admits it's something they haven't done in a while. Still, they end by calling themselves "insignificant" and a "slave to fate," which leaves little sense of hope.
The mood is heavy, lonely, and self-punishing, though the plain, slightly rough rhymes give it a raw, honest, diary-like feel. The odd title adds a contrast with the dark content, perhaps a flash of dark humor or a different kind of honesty.