No Mirror Required

I like where you're going with this, particularly as you incorporate more of the mirror - and very effectively.  One more suggestion: a phrase like "acid of hate" can be shortened to just plain "acid".  Standing on its own, the word is corrosive enough to be set in a context that implies hate without stating it overtly.  Approaching it like that forces you to be precise, choose multi-faceted words, and focus your imagery.  Where your meanings are implied by context, depth ensues. Layering your metaphors within the imagery adds even further depth.  Look for words that relate to specific objects, or feelings, within the poem and see if you can apply them in unusual ways, creating tropes that advance the poem creatively and allow its message to ferment from within.