"Donde Están" is Morad asking one blunt question over and over: where did everybody go? The chorus keeps hammering it, "¿Dónde están los que dicen que estarían cuando no hay nada?" (Where are the ones who said they'd be there when there's nothing?). These are the people who swore they'd "tirar puño y bala" for him (throw punches and bullets, meaning fight for him no matter what), and now he looks around and "no veo nada" (I don't see anything).
The verses are colder and more personal. He grew up with nothing, he says he used to listen to Tego Calderón, the Puerto Rican reggaeton pioneer, "en el talego" (in jail, talego is Spanish street slang for prison), and he admits his ego is a problem: "muero por mi ego" (I'm dying for my ego). My favourite line is the dry math of it all: "Tengo menos amigos y más dinero" (I have fewer friends and more money). He forgives but doesn't forget, and he warns that help can be "un anzuelo" (a fishing hook), someone lifting you up only so the fall hurts more.
Watch for Morad's street Spanish: he drops final letters, so puño' and bala' are puños and balas, and pa' is para.