Written in the voice of someone who has been hurt, both by words and, it seems, by their own hand. The speaker describes tears washing away cruel words that were "slapped" and "beaten" into them, and the "pale scars" on the wrist suggest self-harm, though the poem never says so outright. Shame and anger sit side by side here: "fury and hate" feel carved into the speaker's soul, and they believe they can never wash it away.
The short list in the third stanza, with bonds broken, trust beaten, lies shaken and love scattered, reads like a collapsing relationship, each line a small piece of damage. The mood is raw and heavy for most of the poem. Then the ending shifts. Tears, like anything else, need rain to fall, and after rain comes a rainbow. It's a quiet hint of hope, not a promise that the pain is over, but a sense that the speaker might still be able to see something better coming.