The original story about not handling criticism well was someone crying after a kind question, not merely saying something was a bridge too far. (FWIW if I saw someone cry once, I would consider it might be a one-off due to stress at home etc, not necessarily a constant personality trait I'll have to deal with regularly.)

There’s a difference between feedback regarding your work and language policing something like “you guys” which some people have just suddenly decided is offensive as of 2016 or so because I guess we’ve already solved the rest of sexism.

Because he was saying “hey guys “ naturally without thinking twice.

Now you make him think twice about what he’s saying, of course he’s going to nitpick everything.

There's probably bias on my part. But I didn't cry about the criticism as the person I was replying to mentioned. Technically I abided by the criticism. I didn't agree, but I liked having the social capital with my employer more than I cared about how I felt about the policing. It's all just words in the end, I just thought it was nitpicky.

You appear to be German so I will assume you lack the cultural context to understand why these two things are not comparable. Asking someone born outside of the deep south to refer to a group of people as “y’all” is so absurd my immediate assumption would be that my coworker was playing a joke on me.

The difference being that telling someone they are not allowed to use "guys" is not a valid criticism. It's just someone being a bully and trying to language-police others.

Somehow you missed: Not all critiques are equally valid or valid at all.

and then

Somehow you missed: They did deal with it. The one they criticized did not.