Nasdaq CEO Bob Greifeld may be the most hated man on Wall Street.

That’s judging by the fiery responses the exchange boss fielded yesterday, less than 24 hours after floating a plan to compensate market makers a paltry $40 million, some of it in discounts, for Nasdaq’s embarrassing botch of the high-profile Facebook public stock sale.

Critics of Greifeld’s plan pulled few punches in blasting the executive’s plan as too little too late.

“They’re not even in the ballpark with what they’re proposing,” Tom Joyce, CEO of Knight Capital, said during an interview with CNBC.

“The number I came up with, that the Street has come up with, is well over $100 million,” Joyce noted.

William O’Brien, CEO of Direct Edge, a rival exchange, urged Greifeld to go back to the drawing board and characterized the exchange’s plans to compensate brokers by offering discounts on trades downright “illegal.”

As it stands now, Greifeld is offering market makers who attempted to complete trades of Facebook at $42 a share, $13.7 million in cash and $26.3 million in trading discounts.

Indeed, market participants estimated that Nasdaq should shell out as much as $180 million to compensate brokers and other market makers who didn’t get orders executed properly due to admitted technical glitches at the tech-laden exchange.

“It’s a shameless attempt to turn a big investor confidence-eroding event into a competitive advantage,” O’Brien noted, speaking during an industry conference hosted by Sandler O’Neill.

Rival platform the New York Stock Exchange also believes Nasdaq’s plan is “anti-competitive.”

About the only one that appeared to like the plan was Greifeld, who, at the same event, defended the exchange’s remedy for the second time in as many days.