In my opinion, when doing a code review over a weaker developer, as the stronger developer you should show your strength by making commits to help them improve their pull request, instead of passing back-and-forth a bunch of passive-aggressive comments. If you are reviewing someones work and you go back and forth more than a couple times, you should step in and pro-actively help resolve. Together as a team you draw the conclusion. NOT working as a team is a aspect of a Narcissist.