Too bad at math
There may be a variety of reasons why two people can’t get along, and in this brief text conversation, we may infer what the problem was between these two. Ron is not the brightest tool in the shed, and his girlfriend has had enough.
Ironically, it’s not his mathematical abilities she’s concerned about; instead, it’s his general lack of intellect. Seriously Ron, where did you learn to refer to math as a “personal attribute”?