good luck! i’m with you - i hate writing negative comments. i don’t understand my husband; he gets so frustrated when he doesn’t receive any points for improving his performance in reviews. he thrives on knowing how he can do better.
I’m actually somewhat in the same boat as your husband. When it’s time for my performance review, my boss emails me a copy in advance for me to review before we meet to talk about it. In my first pass review, I look for and highlight (yes, with a highlighter) any negative comments or constructive criticisms, then make notes on how I can improve in those areas, and some key steps to take in the next 6 months.
My second read through is more of a glance, looking at the positives. Usually, my reviews are pretty good overall, but I honestly have an easier time believing the criticisms than the kudos. So it’s not so much looking for how I can improve, but more validating how I’ve failed. I’m kinda cynical, I suppose. I tend to be my harshest critic.