Bent says he hasn't spoken to Lambert about his situation due to Villa's relegation battle.
"I've not been to see the manager," said Bent. "It's been a difficult situation anyway, fighting relegation. The last thing I want to do is go in, kicking and screaming. It's about the team, after all, not one individual.
"But I'm at a loss to know where it all started to deteriorate. I know I've had a few injuries this season and stuff but at the same time I can't pinpoint where it all went wrong.
"I'm not giving it any less than 100 per cent. Sometimes it just goes like that."