To be fair, Damon is judgmental and impatient, so he doesn't tend to think well of anyone. Just that Nux made a particularly bad and stupid impression. Fortunately Damon doesn't feel emotion strongly enough to hate. Detest, much like one would vermin, that's much closer to the truth.

"Oh no, you were very clear in your desire to vanquish me," He taunts, striding forward. "Do you not believe your own eyes, or do you simply lack the capacity to comprehend even that which is blatantly before you? In that case, ending your pathetic existence will be doing you a favor."