After everything Loki did for him, he still planned to double-cross Loki. So when he lost, he felt that he had been truly outplayed. He believes that his loss was well deserved and that if he hadn't been so greedy, he wouldn't have ended up the way he did.
His reaction to the situation now is vastly different because Loki was the one who asked him to make a Supreme Metac. Loki knew that he could deactivate the Supreme Metac right from the start, so Loki must have been planning to take the Supreme Metac from him right from the start.
Because of this, he felt that he had been used. He couldn't accept and wanted to curse Loki with his dying breath.
Unfortunately for him, even his dying breath was cut off and sealed away. He died a completely unresigned death. If he had a choice, he would haunt Loki for all of eternity.
By this time, Loki had just finished yawning. Everything Money Body did, and every curse he made, was all done in the span of a few seconds while Loki was yawning.
