what is "bobby freestyle" about

I know the name comes from the producer of ahmer 30KEY. There are some bars like

"Inn saanpo ki wajah se hi hua scene yahan pe flop" "Roushan kar raha hota rap, lagta woh tumare muh nahi" "Ye khush the Nizam ke har lafde pe Par hume todne se hi toh inke ghar chale"

seems like shots on a rapper to me but can be about "them" too. I'd love to know what these bars mean. I'm relatively new to nizam so any information would be appreciated.