I think some people call it "grammar shaming." I think you're better off critiquing the content. At some point over the last several years, proper grammar has become an ideological issue - something about how our so-called "formal
English" derives from the rich merchant class of long-ago England, and so forcing it on people is discriminatory. Where I teach, some of my colleagues think you should no longer use the term "error, " but refer to grammatical "differences." Who needs clarity? Ambiguity makes communication more like an adventure!