Malcriado translates to "spoiled" or "ill-mannered." It's a vivid and somewhat strong word to describe someone who behaves badly due to being indulged.
In the song, the artist uses it to describe her ex-partner as a "niño malcriado con juguetes nuevos" (a spoiled child with new toys), implying he's immature and doesn't appreciate what he has, ultimately breaking things. This metaphor makes the word particularly impactful and memorable.
Yami Safdie's "Buen Provecho" is a sassy anthem about knowing your worth and refusing to compete for someone's affection. Our singer is not here for games, especially when a guy thinks he can have two people vying for his attention. She hilariously points out, "Me decía que éramos dos / Se ve que no sabe contar" [He told me there were two of us / It seems he can't count], making it clear she's not interested in being one of many.
She's done with wasting time on indecisive partners, telling him, "Porfa, no me elijas a mí / Mejor mentile a alguien más" [Please, don't choose me / Better lie to someone else]. It's a blunt, refreshing take on walking away from someone who doesn't appreciate you, and she wishes him well with a sarcastic "Que te diviertas y buen provecho" [Have fun and enjoy your meal] – basically, good riddance! She's all about being "todo o nada" [all or nothing] and knows she deserves someone who feels the same.