I didn't mind Minko getting mad at Ohana when she badmouthed Tohru. And neither do I mind the new 'insult'. Her rejection scene even gaver her plus points on my mind. My problem came at the end.
What I completely disliked is her reaction towards the end, trying to choke Ohana, going as far as lifting her in the air. I would have prefer the cold shoulder or to give more insults. Not a physical attack.