Maybe I've been missing something. What's the big deal with the Merovingian and the Oracle?
Good question.
Maybe there's some bad blood between them over Seraph? Perhaps Seraph sort of dumped the Merv to protect the Oracle, and the Merv is angry at having lost such a powerful asset to her?
I'm just guessing, but there is clearly a lot more history between the Merv and Seraph than we know. Maybe some of it explains the vendetta the Merovingian has against her.
I always felt it was so spooky in Revolutions when the Merovingian, demanding the eyes of the Oracle, is sucking and chewing on the olives...
Someone posted this on the Merovingian wiki page, and I think it's pretty solid:
"While the Oracle (as her name suggests) is endowed with foresight, the Merovingian is endowed with hindsight. Or restated, the Oracle's gift is inductive reasoning, whereas the Merovingian's strength is deductive reasoning. This explains why the Merovingian's worldview is based upon causality and the reason that throughout The Matrix Reloaded and The Matrix Revolutions he is interested in why or how events unfold. Like all sentient programs within the Matrix (and the Machines in the real world), the Merovingian is a determinist, which is the basis for his dissertation on causality being the nature of the universe. Due to the conflicting nature between himself and the Oracle, the Merovingian decries her as a "fortune teller"; yet reveals in the third film that he secretly longs for "the eyes of the Oracle", which he believes would allow him fantastic powers of precognition.
"The Merovingian believes that the person who holds the most power is the person who understands why the current state is what it is (or how events unfolded to their current state). His deductive ability or hindsight ability also afflicts him with hindsight bias and so his personality is thus arrogant and purports to be all-knowing."