I was honestly surprised Ruri didn't chew her out after that rant, so far the only person who clearly doesn't care about other people have been her. Half of the reasons she doesn't like Ruri are not even things she can control!
Maeda just seems like the type of person who does not like interaction, who then comes up with reasons in retrospect to justify being rude to avoid it.
She's really pulling at straws there, using inconsequential nitpicks to act like she's doing the other person a favour by dismissing them out of hand.
Pisses me off.
Kinda impressed with Ruri going for the "kill them with kindness" approach.