Victimarios is a powerful word that literally means "perpetrators" or "victimizers". It's a very unusual word to find in a love song, which makes it incredibly interesting.
Ozuna sings, "Los dos somos victimarios de un amor correspondido" (We are both perpetrators of a reciprocated love). He uses this dramatic word to create a paradox: how can you be a villain in a love that is mutual? It suggests that by staying with other people, they are the ones causing all the pain, victimizing both themselves and their current partners.
This song is all about a classic, messy situation: two people who are still in love but are stuck in relationships with other people. Ozuna spots his ex with her new boyfriend and he is not subtle about how he feels. He opens by saying, "¿Qué si a mí me matan los celos / Cuando te veo con él? Eso es obvio" (What if jealousy kills me / When I see you with him? That's obvious). He's convinced she's faking her happiness, telling her he can see right through it because "Esos ojitos bonitos ya no te han vuelto a brillar" (Those pretty little eyes haven't sparkled again).
The whole idea is that they're both with the wrong people. He calls their new partners "los enemigos" (the enemies) and says they are both "durmiendo con los enemigos / Dos seres que jamás hemos querido" (sleeping with the enemies / Two beings we have never loved). It's a dramatic way of saying they're wasting their time with people they don't truly love. He believes their connection is undeniable, describing them as "el hambre y las ganas de comer" (hunger and the desire to eat), a perfect, unstoppable match.