Rodri was sent off for clashing with the Nottingham Forest attacker immediately after halftime.
"Was it enough for Morgan Gibbs-White to go down? No it wasn't," Agbonlahor said on talkSPORT.
"He should be on WWE Gibbs-White. It was outstanding acting. I would never go down like that. Out of embarrassment of your friends seeing it on TV."
City went onto win 2-0 at the Etihad.