Thank you for auditioning! Since your voice drifts off at the end of your sentences often, it ends up making the character sounding disinterested, doesn't reflect what the character is doing (fighting) and lacks a finite, conclusive sound. For "This'll end it!", it also sounds like you're restricting your voice too much, thus holding back acting-wise. You're also close to peaking (which would distort your audio), so I would suggest lowering your gain especially when you need to get loud.