- worked there for less than two years and had no direct reports
- never attended some sort of key meeting
- did not work on the subject matter in question
...and therefore, she lacks context which undermines some of her claims.
Which of those is a matter of character, or a "disgusting" attack? They might be wrong, or they might be right but bringing up irrelevancies, but the writer is acting like stating these is some sort of reprehensible smear.