Agbonlahor believes he has given Werner the benefit of the doubt due to his first season in the Premier League but it seems the Germany international does not have what it takes to succeed at Stamford Bridge.
Werner joined the West Londoners from RB Leipzig before the beginning of this season for a huge amount in the region of £47.5millon.
The 25-year-old is yet to impress in Chelsea despite showing glimpses of his potential in the iconic blue jersey.
Werner has modestly racked up 12 goals and 14 assists in all competitions this season, but has equally missed a lot of glaring goal scoring opportunity which has subjected him to intense criticism.
Speaking on talkSPORT, Agbonlahor said: “I’ve tried to give him the benefit of the doubt as it’s his first season, but the more I’m seeing of him he’s making the wrong decision.
“He picked the ball up, running at two defenders and takes a wild shot over the bar when it’s best to make a pass and another run.
“He seems a bit too erratic and Chelsea, with their history with the likes of Didier Drogba and the strikers they’ve had in the past, they need to go out and buy a big, big striker who can score goals and turn up in the big games.”
Former Chelsea striker Tony Cascarino echoed what the former English footballer said about Werner.
He said: “He makes a lot of bad decisions for a striker. I’ve been there and know what I’m talking about on this. I did it for a period in my career.”
“He’s doing that at the moment too regularly. For someone who can devastate with his pace, he gets in position and thinks “what am I going to need to do?” Ultimately, he chooses the wrong option."