The review goes better when the standard stayed the same throughout the work.

Most bad reviews are arguments about a rule that changed. Work gets done to one understanding of good, and then judged against a different one that arrived late, sometimes only in the reviewer’s head. The person being assessed cannot defend against that, so the conversation becomes a negotiation about the past instead of a look at the work.

Agree the standard before the work starts and write it somewhere both of you can see. If it has to change midway, say so at that moment rather than at the end. When you review, judge against what was actually agreed, and keep any new expectations for the next round.