Like any other person , even i am quite annoyed with kria saying "why is rey so angry , why does he hate me blah blah blah!"
It makes her look dumb right? And this was so NOT HER! No one knows the truth , so this is so obvious that they would hate her.
Keeping aside the gang part and etc. I have a reason for kria's this behavior.
She does not know that rey moved on right? It's so obvious , cause kria is no despo chick...So she still thinks he loves her the way he used to 1 and a half year back. (Abhi bhi karta hain bas he is just a bit blinded..:P)
Remember the old rey? Wasn't he the cutest boyfriend anyone could get , with his insecure behavior , his caring nature , the egoistic side of his , the loving side of him , the friend side of him. He could forgive kria ,when she gave her sweet si smile and a big and sacchi wala sorry.
This time , kria DOESN'T know the intensity of hurt he has stored inside him. She ditched him , it's obvious he would hate her and insult her , she is used to this side of him , but she isn't used to the side of rey who would NOT ONCE LISTEN TO HER. After the slap incident , remember he was angry , but could actually listen to what she said.
Kria knows rey very well , she always knew rey's reaction for everyone , but she never knew for her. She knows how will he react when his plan gets rejected but she does not know how he will react when he sees her. And kria has always had a nature of thinking the wrong pov of rey. (Don't shoot me daggers , it's true) .
When they were in a relationship , rey did fight with her , but they would solve it in less than 24 hours only if it was kria's fault and she realizes it , that shows another forgiving side of rey towards kria . So this has taken her AGAIN by surprise.
She knows she deserves to be hated , but she did not think the intensity of the hatred would be so much.
I Wrote Utter Crap , I Am Sure You Guys Must Be Yawning :P . In short , the rey whom kria had seen 1 and a half years back and whom kria knows for herself is different from the rey she sees now.
Sorry , i don't even know what i wrote..:P