After taking an early lead, two goals in each half sealed a 4-1 defeat and left the Somerset club in the relegation zone.
He told the club's official website: "We were second best all over the field. We looked first division today. We didn't hold the ball up whatsoever."
"[There were] certain aspects were we done alright, but there were certain aspects were we were nowhere near."
Yeovil are level on points with bottom club Barnsley, having won only one of their 11 games.