Carlito was an idiot
He let Benny Blanco live and when Saso came to warn him about Pachanga he just ignored it like a moron. Carlito died because he was stupid. As Saso said, Pachanga would kill his own mother. Why he would let Benny Blanco live is beyond me. Carlito was just stupid. Pacino was Michael Corleone, he was Tony Montana, and he was Carlito Brigante. Carlito Brigante is by far, the dumbest. Michael was ruthless and Tony was crazy. But Carlito was just stupid.
You think you're gonna sail off into the sunset, think again.