These are pretty milquetoast & Barbara, while a massive bitch, is not the worst person of all time who's also an english VA (That crown of shame is still on Amanda Winn Lee's head & it'll stay for a while) & others in just Rooster Teeth itself do worse, but out of all 4 RWBY actors, Barbara's the worst, followed by Arryn (aka Brunette Barbara)
Can't take criticism:
Takes the Patrick Soderland's Battlefield V approach when people remotely criticize RWBY or Yang or just her as a person in general. Blocks people on people calling her out, such as here. You can check "Barbara Dunkelman block" on YT to see other people talking about it.
You'll find a lot of simps in the way:
While it's known that nobody in Rooster Teeth can take criticism, they also (to a certainly low extent) try to keep their spergy mouths shut. Barbara doesn't even do that, she buries herself & the show deeper everytime someone calls her out.
An example:
https://youtu.be/XthMuPsaS_c
Karma Houdini:
She's also known to play Karma Houdini everytime on controversies, there was one time where she sent her simpy fans & RT staff on Piers Morgan for a simple typo. She neither called them off, nor apologized. Instead, she got hailed as a hero by people.
There's an imgur post about it which doesn't work anymore, but just google "Piers Morgan Barabara Dunkelman"
Edit:
Thanks Fougaro:
https://youtu.be/28rqWUFjBj8
Being a bad partner:
Her ex Aaron broke up with her due to being controlling & hot-headed. It also makes you realize how Adam suddenly became the same & why some say that VAs have more control of RWBY most of the time than writers.
Thinks she's some big shit:
6 years ago from now, she basically bitched about how non-celebs (basically normal people) with low followers shouldn't have a twitter just because they're not celebs & have a low follower count.
In other words, it's bascially the low follower ad-hominem used by twitter people who can't handle arguments, alongside anime pfp, pronouns in bio, etc.
But in her case, she just wants them to not exist alltogether.