Cardi B expressing concern for someone named J.P. after watching a 50v1 video suggests she’s seen a video where J.P. was outnumbered (50 versus 1) in some sort of confrontation or altercation. Her comment “wants better” indicates she wishes for J.P. to have a safer or more positive situation. It’s not clear who J.P. is or the context of the video, but Cardi B’s statement suggests she’s empathetic towards him and perhaps feels he deserves better treatment or circumstances.