Eh, another day, another rant on rap. It depends on the rappers you have listened to.
Eminem, NaS, Jay-Z, and Kanye West are far from retards trying to rhyme. They are poets. If you're too blinded with bias to see that, that's your loss.
If you listen to other rappers, who just talk about hoes, cars, and money, then yes...rap can be bad.