Karren seems to have a tendency to make comments personal, which from a business point of view looks very immature.
She called - for example - Jim 'passive-agressive' which I think is a downright insult. It would have been diferent if she had said that his approach to certain tasks looked 'passive-agressive' to her, but instead she made it an attack on his personality (this of course all besides the point that she clearly has no idea what passive-agressive behaviour looks like, or she would have seen that Jim's behaviour is the opposite.

).
Not sure whether she called Susan stupid or that she referred to the questions she asked. But as it bore no relevance whatsoever to the outcome of the task and they were made in more or less brainstorm kind of circumstances, it made her attack seem all the more personal (and kind of stupid in my opinion.... ).