I don’t know if this is a mental hack or not, but I found years ago that if I mentally sing the comments (that I know would upset me otherwise), it totally removes the emotional impact of other people’s negative writing.
When I was contemplating why this might be so effective, I was reminded that satire of old often involved singing to point out other peoples absurdity. When you think about how much the powerful fear humor and satire, there might be something there…