Sorry, but your listing agent should do what you ask them to do, within reason. As embarassing as he/she might *feel* about this situation, he/she should realize this is business. If he/she isn’t willing to, find another agent, as some others indicate.
Afterall, if it’s such a ridiculous offer, and the seller has so many better offers, your offer is going to be ignored anyway….
Insist on him/her putting the offer on the table, and if he/she doesn’t tell, him/her “thank you for helping me”, but I think I want someone who can represent my interests better.