"Undesirable" by Atlas Ivy appears to be a deeply personal and vulnerable exploration of the singer's struggles with body image issues, addiction, and self-worth. The song opens with a confession of breaking a six-month sober streak and feeling guilty about it. The singer questions their own definition of "sick enough" and how it is never enough. The pre-chorus highlights a desire to change or rewire their brain to overcome these challenges.

The chorus reveals the singer's belief that they are a "fuck-up" because they can't seem to get anything right, including eating properly and having a bright future. The use of the phrase "all 'cause my body ain't light" further emphasizes their negative body image and how it's affecting their overall mental state.

In the second verse, the singer mentions their therapist's opinion that they have a perfect body, but it doesn't matter because their mind's eye is going blind. This could be interpreted as the disconnect between how others see them and how they see themselves, leading to feelings of undesirability.

The outro repeats the chorus with an added emphasis on the singer's inability to do anything right and the bleakness of their future. Overall, "Undesirable" is an honest and raw portrayal of the singer's struggles with addiction, body image, and self-esteem.

In a wider context, the song sheds light on the importance of mental health and self-love, and the negative impact that societal beauty standards can have on people's mental and physical well-being.