Despite his words Sasuke is thinking more along the lines of fighting rather than actual killing. Would it make him feel better? Short term, yes. But in the long run, no. Probably not, anyway.

"Is that your solution to everything? Let people beat the shit out of you?: He remembers what was Naruto had said about Karui. About letting her punch him half to death just because he felt bad for her or whatever the hell it was.