Coronaste comes from the verb coronar, which literally means "to crown". In slang, it's often used to mean "you won" or "you succeeded", like hitting the jackpot.
In this song, Jessie Reyez uses it with a cutting edge. She sings, "Coronaste por poco" (You won for a little while), sarcastically acknowledging her ex's brief moment of triumph before she delivers the punchline: "y me perdiste por bobo" (and you lost me for being a fool). It's a powerful and unforgettable word choice.
Jessie Reyez is not holding back in this bilingual R&B track. "ADIÓS AMOR" is a sharp, final goodbye to a lover who messed up. She starts by saying it's a "Cold world babe, I should've cheated," and then immediately mocks her ex's sadness: "Pobrecito el niño sigue triste" (Poor little boy is still sad). She makes it clear he underestimated her, repeating the line "No sabías con quien te metiste" (You didn't know who you were messing with).
Even though she admits it hurts, she's done crying because "yo ya di demasiado" (I already gave too much). She's moving on completely, saying that even if the past calls, "Mi teléfono está apagado" (My phone is turned off). The song ends with some beautiful but cold comparisons for her departure, like "Como el olor después de la lluvia" (Like the smell after the rain) and "Como al sol se le va la luna" (Like the moon leaves the sun). It's a natural, inevitable ending, and she has no regrets.