I don&#x27;t think in your case it would be a lie to say &quot;It&#x27;s not a good fit.&quot; Design is a pretty subjective area so it&#x27;s likely the case someone else will find his work to be higher quality than you do.  Maybe he&#x27;s asking you for critiques because he can tell you aren&#x27;t digging what he&#x27;s producing, or maybe the vibe between you is no good and you&#x27;re perceiving that as mediocre work.  In any event, best to get it over with; you&#x27;ll both be better off without one another it seems.