Well, I guess that has been the CV's strategy. They had Riddhima break down in front of Armaan once when she apologised for doing this to him. But, by that time, she had moved on. She has moved on now, and she has apologised too. Now her thinking about Armaan, regret in her eyes would only anger SRians that WHY THE HELL IS RIDDHIMA THINKING ABOUT HER EX? And it will anger ARs that WHY THE HELL RIDDHIMA IS STAYING WITH SID IF SHE LOVES ARMAAN?? 
Try to look at the both sides of the coin. Whatever she does, she would be at blame. Right now, not thinking about Armaan only angers AR fans but if they make Riddhima think about Armaan more, that would anger both fan groups!
PS - I havent bashed anyone. Just tried to analysis the situation by looking at both sides other than giving biased opinions.