Wile Coyote has a deep motivation to eat Bug's Bunny. He is hunger for rabbit pushes him into his quest to make Bug's Bunny his dinner. Then when he isn't able to simply trick Bug's Bunny his motivation changes. He is now pulled into outsmarting Bug's Bunny, with the end game being dinner. Every time Bug's Bunny outsmarts Wile Coyotes genius plans, Wile is motivated more to outsmart Bug's then to eat him, though his motivation for outsmarting still ends with Wile eating him.
Wile Coyote's anger makes it impossible to defeat Bug's Bunny. He becomes so determined to out smart him, it consumes him. This make's it even easier for Bug's Bunny to out smart Wile thus making Wile even more frustrated. Wile's frustration though making him more determined to win is actually detracting from him mental ability to think and process clearly. The cartoon always end's the same. Wile so consumed by hunger and frustration he loses his self control and his plans are more irrational with each new plan he creates.