Rencores translates to "resentments" or "grudges". It's a strong word that delves into deeper emotional conflict rather than simple disagreements.
In the song, the artist sings, "Aunque siempre que arreglamos, peleamos por tus rencores" (Even though every time we fix things, we fight because of your resentments). This word highlights the lingering bitterness and unresolved issues that plague the relationship, making it a key element in understanding the song's narrative of a troubled love.
Darell spends the whole chorus admitting he's the problem. "Soy tu peor error" ("I'm your worst mistake") and "La causa de tu dolor" ("the cause of your pain") aren't boasts, they're an apology dressed up as a reggaetón hook, and he repeats them so many times it starts to sound like he's trying to convince himself as much as her.
The verses fill in what he actually did wrong. He asked her friend how she's doing and got told "ya tú no estás pa' mí" ("you're not for me anymore"), and instead of leaving it alone he keeps circling back: "¿Que a tu casa te lleve flore'?" ("Should I bring flowers to your house?"). He admits the fights went both ways too, "tampoco tú no haces nada pa' que mejores" ("you don't do anything to make it better either"), but underneath the back and forth, the plain request never changes: "Regresa porfavor" ("Come back, please").