How do you deal with people who take _any_ critique of their code as a personal affront? I'm working with one of such people right now, for the first time in my

How do you deal with people who take _any_ critique of their code as a personal affront? I'm working with one of such people right now, for the first time in my 25 years in the industry. I'm a consultant, and he's an FTE. I'm considerably more experienced and senior and management knows it. The guy's PRs have been sitting in the queue for over a month now because there's no way I'll let him submit his shit code to master, and he just won't clean it up. That's not how I phrased it in the review obviously. I explained how the code could be improved (and why it needs to be improved) and gave concrete suggestions, using the most diplomatic language I could come up with. I explained to his manager why the PR is stuck. His manager is conflict-averse, so he won't push the guy, knowing how easily he gets offended. I mean ultimately, my contract ends in January, so I could just merge the PR and say "après moi, le déluge", but in case I encounter such people again in the future, what do people usually do?