Below, you'll see any text that was highlighted with comments from the reviewer.
I was left with a feeling that the world had been unfair, and the narrator has gotten a well deserved triumph.
One idea is to change "less of a human" to "as human as a..." and choose an animal or object. This would create a simile
Another is to add a word after "I am an untouchable," such as "I am an untouchable fire." This would create a metaphor.
"Those scars you drew through my heart"
I can picture scares being "[drawn] through your heart," which isn't a normal picture (this is a unique way of using words).
The overall feeling of the poem is great. Just keep adding fine details.
Overall, a great poem!