> my take away is this person was probably just difficult in general, there may have been other reasons they were not promoted.

My general impression is that it's the difficult people who use terms like "toxic" to describe those they clash with. His "Interesting fact 1" is also a red flag. Dirty words in some internal memo? I'm scandalized!

I don't like Atlassian for their slow software, but I'm sure it's a fine company to work for.